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Meens Miller E, O’Rourke N, Jeffrey M, Green-Johnson J, Dogra S. Novel biomarkers in the saliva of healthy young males and females in a randomized crossover study on sedentary time: An exploratory analysis. PLoS One 2024; 19:e0308838. [PMID: 39163400 PMCID: PMC11335159 DOI: 10.1371/journal.pone.0308838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Accepted: 07/31/2024] [Indexed: 08/22/2024] Open
Abstract
Several known biomarkers have been used to understand the physiological responses of humans to various short and long-term interventions such as exercise or dietary interventions. However, little exploratory work has been conducted to identify novel biomarkers in human saliva that could enable non-invasive physiological research to understand acute responses to interventions such as reducing sedentary time. The purpose of this study was to identify novel biomarkers in the saliva (cytokines, growth factors and vascular factors) that respond to prolonged (4 hours) and interrupted sitting (4 hours of sitting interrupted by 3 minutes of walking at 60% of maximal heart rate every 27 minutes) in young, healthy males and females. We also sought to determine whether responsive biomarkers would differ by sex. Participants (n = 24, 21.2 ± 2.2 years, 50% female) completed a prolonged sitting (PS) session and an interrupted sitting (IS) session in random order. Individual saliva samples were pooled into a male sample and a female sample to identify responsive biomarkers using a human cytokine antibody membrane array (42 targets). Several novel biomarkers were responsive in both sexes (e.g., IL-8, Angiogenin, VEGF, and EGF), in females only (e.g., TNF-α and IL-13), and in males only (e.g., IL-3, RANTES, and IL-12p40/p70). Importantly, several biomarkers appear to be responsive to the 4-hour prolonged and interrupted sitting sessions (e.g., TNF-α, IL-8, IL-3, RANTES, EGF, Angiogenin, and VEGF). This work highlights new directions for researchers aiming to investigate the effect of short-term or acute interventions on different physiological pathways using non-invasive methods. Our work clearly indicates that human saliva samples can provide a wealth of insight into physiological responses, and that a number of biomarkers can be used to understand changes induced by acute interventions such as interrupting prolonged sitting.
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Affiliation(s)
- Emmeline Meens Miller
- Faculty of Health Sciences (Kinesiology), University of Ontario Institute of Technology, Oshawa, ON, Canada
| | - Nicholas O’Rourke
- Faculty of Health Sciences (Kinesiology), University of Ontario Institute of Technology, Oshawa, ON, Canada
| | - Michael Jeffrey
- Faculty of Science (Biology), University of Ontario Institute of Technology, Oshawa, ON, Canada
| | - Julia Green-Johnson
- Faculty of Science (Biology), University of Ontario Institute of Technology, Oshawa, ON, Canada
| | - Shilpa Dogra
- Faculty of Health Sciences (Kinesiology), University of Ontario Institute of Technology, Oshawa, ON, Canada
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Shivgulam ME, O’Brien MW, Wu Y, Liu H, Petterson JL, Schwartz BD, Kimmerly DS. Sitting knee-flexion angle does not influence endothelial-dependent vasodilation in laboratory or free-living conditions. Vasc Med 2024; 29:381-389. [PMID: 38594895 PMCID: PMC11323422 DOI: 10.1177/1358863x241238702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/11/2024]
Abstract
INTRODUCTION Single bouts of prolonged bent-legged sitting attenuate popliteal endothelial-dependent vasodilation (as assessed via flow-mediated dilation [FMD]), which is partially attributed to arterial 'kinking'. However, the impact of knee-flexion angle on sitting-induced popliteal FMD is unknown. The objective of this study was to perform separate laboratory and free-living studies to test the hypotheses that: (1) popliteal FMD impairments would be graded between knee flexions at 90° (bent-legged sitting) > 45° > 0° (straight-legged sitting) following a 3-hour bout of sitting; and (2) more habitual time spent bent-legged sitting (< 45°) would be associated with lower FMD. METHODS The laboratory study included eight young, healthy adults (24 ± 2 years; four women) who underwent two sitting bouts over 2 days with one leg positioned at a knee-flexion angle of 0° or 90° and the opposite leg at 45° knee flexion. Popliteal FMD was assessed at pre- and postsitting timepoints. RESULTS Sitting-induced reductions in FMD were similar between all knee-flexion angles (all, p > 0.674). The free-living study included 35 young, healthy adults (23 ± 3 years; 16 women) who wore three activPAL monitors (torso, thigh, shin) to determine detailed sedentary postures. Time spent sedentary (624 ± 127 min/day), straight-legged sitting (112 ± 98 min/day), and bent-legged sitting (442 ± 106 min/day) were not related to relative FMD (5.3 ± 1.8%; all, p > 0.240). CONCLUSION These findings suggest that knee-flexion angle-mediated arterial 'kinking' during sitting is not a major contributor toward sitting-induced popliteal endothelial-dependent vasodilatory dysfunction.
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Affiliation(s)
| | - Myles W O’Brien
- Department of Medicine, Université de Sherbrooke, Sherbrooke, QC, Canada
- Centre de Formation Médicale Du Nouveau-Brunswick, Université de Sherbrooke, Moncton, NB, Canada
| | - Yanlin Wu
- Autonomic Cardiovascular Control and Exercise Laboratory, Division of Kinesiology, School of Health and Human Performance, Faculty of Health, Dalhousie University, Halifax, NS, Canada
| | - Haoxuan Liu
- Autonomic Cardiovascular Control and Exercise Laboratory, Division of Kinesiology, School of Health and Human Performance, Faculty of Health, Dalhousie University, Halifax, NS, Canada
| | - Jennifer L Petterson
- Autonomic Cardiovascular Control and Exercise Laboratory, Division of Kinesiology, School of Health and Human Performance, Faculty of Health, Dalhousie University, Halifax, NS, Canada
| | - Beverly D Schwartz
- Autonomic Cardiovascular Control and Exercise Laboratory, Division of Kinesiology, School of Health and Human Performance, Faculty of Health, Dalhousie University, Halifax, NS, Canada
| | - Derek S Kimmerly
- Autonomic Cardiovascular Control and Exercise Laboratory, Division of Kinesiology, School of Health and Human Performance, Faculty of Health, Dalhousie University, Halifax, NS, Canada
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Christofaro DGD, Ferrari G, Cucato GG, Mota J, Silva DR, Vanderlei LCM, Tebar WR, Brazo-Sayavera J. Association of meeting the 24-h movement guidelines with high blood pressure in adolescents: a cross-sectional study. Sci Rep 2024; 14:17060. [PMID: 39048634 PMCID: PMC11269724 DOI: 10.1038/s41598-024-68063-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Accepted: 07/19/2024] [Indexed: 07/27/2024] Open
Abstract
The 24-h movement guidelines for children and adolescents comprise recommendations for adequate sleep, moderate to vigorous physical activity (MVPA) and sedentary behaviour (SB). However, whether adolescents who meet these 24-h movement guidelines may be less likely to have high blood pressure (HBP) has not been established. The present study assessed the association between meeting 24-h movement guidelines and HBP in a school-based sample of 996 adolescents between 10-17 years (13.2 ± 2.4 years, 55.4% of girls). Blood pressure was measured using a digital oscillometric device, while sleep, MVPA and SB were measured using the Baecke questionnaire. The association between the 24-h movement guidelines and HBP was performed using binary logistic regression adjusted for sex, age, socioeconomic status, and body mass index. It was observed that less than 1% of the sample meet the three 24-h movement guidelines. The prevalence of HBP was lower in adolescents who meet all three movement 24-h guidelines (11.1%) compared to those who did not meet any guidelines (27.2%). Individual 24-h movement guidelines analysis showed that adolescents with adequate sleep were 35% less likely to have HBP (OR = 0.65; 95% CI 0.46-0.91). Meeting sleep guidelines combined with meeting MVPA (OR = 0.69; 95% CI 0.50-0.95) or SB (OR = 0.67; 95% CI 0.48-0.94) was inversely associated with HBP. Adolescents who meet two or three 24-h movement guidelines were respectively 47% (OR = 0.53; 95% CI 0.29-0.98) and 34% (OR = 0.66; 95% CI 0.48-0.91) less likely to have HBP. In adolescents, meeting sleep and 24-h movement guidelines were inversely associated with HBP.
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Affiliation(s)
- Diego G D Christofaro
- Post-graduation Program in Movement Sciences, Faculty of Sciences and Technology, São Paulo State University (Unesp), Roberto Simonsen Street, number 305, Presidente Prudente, State of Sao Paulo, 19.060-900, Brazil.
| | - Gerson Ferrari
- Faculty of Health Sciences, Universidad Autónoma de Chile, 7500912, Providencia, Chile
| | - Gabriel G Cucato
- Department of Sport, Exercise and Rehabilitation, Northumbria University, Newcastle Upon Tyne, UK
| | - Jorge Mota
- Research Center On Physical Activity, Health and Leisure (CIAFEL), Faculty of Sports and Laboratory for Integrative and Translational Research in Population Health (ITR), University of Porto, Porto, Portugal
| | - Danilo R Silva
- Department of Physical Education, Federal University of Sergipe (UFS), São Cristóvão, Brazil
| | - Luiz Carlos M Vanderlei
- Post-graduation Program in Movement Sciences, Faculty of Sciences and Technology, São Paulo State University (Unesp), Roberto Simonsen Street, number 305, Presidente Prudente, State of Sao Paulo, 19.060-900, Brazil
| | - William R Tebar
- Post-graduation Program in Movement Sciences, Faculty of Sciences and Technology, São Paulo State University (Unesp), Roberto Simonsen Street, number 305, Presidente Prudente, State of Sao Paulo, 19.060-900, Brazil
| | - Javier Brazo-Sayavera
- Department of Sports and Computer Science, Universidad Pablo de Olavide, Seville, Spain
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Soto-Rodríguez FJ, Moya AP, Bobadilla-Agouborde CJ, Pérez-Mármol JM. Effect of Exercise Prior to Sedentary Behavior on Vascular Health Parameters: A Systematic Review and Meta-Analysis of Crossover Trials. SPORTS MEDICINE - OPEN 2024; 10:69. [PMID: 38853205 PMCID: PMC11162984 DOI: 10.1186/s40798-024-00734-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 05/22/2024] [Indexed: 06/11/2024]
Abstract
BACKGROUND Sedentary behavior has been shown to negatively affect parameters of endothelial function and central hemodynamics, both of which are closely associated with vascular health. Exercise prior to sedentary behavior has demonstrated potential as a preventive strategy to mitigate these detrimental effects. To evaluate the impact of exercise prior to sedentary behavior on vascular health parameters in the adult population, a systematic review and meta-analysis were conducted, synthesizing the available body of knowledge. METHODS A literature search was carried out in 6 databases. For each outcome, standard error and mean difference or standardized mean difference were calculated, as appropriate. An analysis was performed using a random effects model with a 95% confidence interval, using the inverse variance statistical method. Risk of bias assessment was performed using ROB2 and considerations for crossover trials. The quality of evidence was assessed using the GRADE system. RESULTS Exercise performed prior to prolonged sedentary behavior resulted in increased flow-mediated vasodilation at the first and third hours of sedentary time, compared with the control condition of sedentary behavior without prior exercise [MD: 1.51% (95% CI: 0.57 to 2.45) and MD: 1.36% (95% CI: 0.56 to 2.16), respectively]. Moreover, prior exercise led to increased shear rate at the first and third hours of sedentary time [MD: 7.70 s^-1 (95% CI: 0.79 to 14.61) and MD: 5.21 s^-1 (95% CI: 1.77 to 8.43), respectively]. Furthermore, it increased blood flow at the third hour [SMD: 0.40 (95%CI: 0.07 to 0.72)], compared with the control condition of prolonged sedentary behavior without prior exercise. Regarding hemodynamic parameters, exercise prior to prolonged sedentary behavior decreased mean arterial pressure during the first and third hours of sedentary behavior [MD: -1.94 mmHg (95% CI: -2.77 to -1.11) and MD: -1.90 mmHg (95% CI: -3.27 to -0.53), respectively], and an increase in heart rate during the first hour [MD: 4.38 beats per minute (95%CI: 2.78 to 5.98)] compared with the control condition of prolonged sedentary behavior without prior exercise. CONCLUSIONS The findings of this research suggest that prior exercise may prevent the impairment of vascular health parameters caused by sedentary behavior. However, the quality of the evidence was estimated as moderate. Therefore, further experimental studies and high-quality clinical trials are needed in this field to strengthen the results and conclusions drawn. PROSPERO REGISTRATION NUMBER CRD42023393686.
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Affiliation(s)
- Francisco Javier Soto-Rodríguez
- Departamento de Ciencias de la Rehabilitación, Facultad de Medicina, Universidad de La Frontera, Temuco, Chile.
- Facultad de Ciencias de la Salud, Carrera de Kinesiología, Universidad Autónoma de Chile, Temuco, Chile.
| | - Alicia Peris Moya
- Departamento de Fisioterapia, Facultad de Ciencias de la Salud, Universidad de Granada, Granada, Spain
| | | | - José Manuel Pérez-Mármol
- Departamento de Fisioterapia, Facultad de Ciencias de la Salud, Universidad de Granada, Granada, Spain
- Instituto de Investigación Biosanitaria (ibs.GRANADA), Granada, Spain
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Zafaranieh S, Siwetz M, Leopold-Posch B, Kummer D, Huppertz B, Desoye G, van Poppel M. Placental structural adaptation to maternal physical activity and sedentary behavior: findings of the DALI lifestyle study. Hum Reprod 2024; 39:deae090. [PMID: 38733100 DOI: 10.1093/humrep/deae090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 04/09/2024] [Indexed: 05/13/2024] Open
Abstract
STUDY QUESTION Are maternal levels of moderate-to-vigorous physical activity (MVPA) and sedentary time (ST) in obese pregnant women associated with placental structural adaptations for facilitating oxygen delivery to the fetus? SUMMARY ANSWER Higher maternal MVPA and ST are associated with a higher density of villi, a proxy measure of placental surface area for oxygen delivery to the fetus, without further added placental vessels. WHAT IS KNOWN ALREADY Physical activity during pregnancy intermittently reduces uterine blood flow, potentially limiting placental and fetal oxygen supply. The placenta can mount several adaptive responses, including enlargement of the surface area of villi and/or feto-placental vessels to accommodate fetal needs. Early research on the morphology and growth of the placenta with exercise interventions has shown inconsistencies and is lacking, particularly in non-lean pregnant women. STUDY DESIGN, SIZE, DURATION This study is a secondary longitudinal analysis of the vitamin D and lifestyle intervention for gestational diabetes prevention (DALI) randomized controlled trial. The prospective study was conducted between 2012 and 2015 in nine European countries at 11 different sites. In this analysis, 92 pregnant women with a BMI ≥ 29 kg/m2 were combined into one cohort. PARTICIPANTS/MATERIALS, SETTING, METHODS MVPA and percentage of time spent sedentary (% ST) were measured with accelerometers during gestation. Placental sections were immunostained for endothelial cell-specific CD34. Artificial intelligence (AI)-based stereology assessed villous density, number, and cross-sectional area of vessels on whole-slide images and in selected regions comprising peripheral villi only, where the majority of vascular adaptations occur. Expression of pro- and anti-angiogenic factors was quantified using molecular counting analysis. MAIN RESULTS AND THE ROLE OF CHANCE In multivariable regression, higher levels of maternal MVPA (min/day) were associated with a higher density of villi in both whole-slide images (beta 0.12; 95% CI 0.05, 0.2) and selected regions (0.17; CI 0.07, 0.26). Unexpectedly, ST was also positively associated with density of villi (0.23; CI 0.04, 0.43). MVPA and ST were not associated with vessel count/mm2 villous area, vessel area, or pro- and anti-angiogenic factor mRNA expression. All estimates and statistical significance of the sensitivity analyses excluding smokers, women who developed gestational diabetes or pre-eclampsia and/or pregnancy-induced hypertension were similar in the main analysis. LIMITATIONS, REASONS FOR CAUTION The placenta is a complex organ undergoing dynamic changes. While various adjustments were made to account for different maternal contributing factors, in addition to the outcome measures, various other factors could impact oxygen delivery to the fetus. WIDER IMPLICATIONS OF THE FINDINGS For the first time, we evaluated the association between placental structures quantified using an AI-based approach with objectively measured physical activity and ST at multiple time points in pregnant women with obesity. The observed adaptations contribute to the advancement of our understanding of the hemodynamics and adaptations of the placental unit in response to MVPA and ST. However, our results might not be generalizable to lean pregnant women. STUDY FUNDING/COMPETING INTEREST(S) The DALI project has received funding from the European Community's 7th Framework Program (FP7/2007-2013) under grant agreement no. 242187. The funders had no role in study design, collection of data, analyses, writing of the article, or the decision to submit it for publication. The authors have no conflicts of interest to declare. TRIAL REGISTRATION NUMBER ISRCTN70595832.
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Affiliation(s)
- Saghi Zafaranieh
- Department of Human Movement Science, Sport and Health, University of Graz, Graz, Austria
| | - Monika Siwetz
- Division of Cell Biology, Histology and Embryology, Gottfried Schatz Research Center, Medical University of Graz, Graz, Austria
| | | | - Daniel Kummer
- Division of Cell Biology, Histology and Embryology, Gottfried Schatz Research Center, Medical University of Graz, Graz, Austria
| | - Berthold Huppertz
- Division of Cell Biology, Histology and Embryology, Gottfried Schatz Research Center, Medical University of Graz, Graz, Austria
| | - Gernot Desoye
- Department of Obstetrics and Gynecology, Medical University of Graz, Graz, Austria
| | - Mireille van Poppel
- Department of Human Movement Science, Sport and Health, University of Graz, Graz, Austria
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DiFrancisco-Donoghue J, Borges K, Li T, Ballone O, Zwibel H, Douris PC. Reducing thrombotic risks in video gamers: investigating the benefits of walking and compression sleeves on blood hemodynamics. Am J Physiol Heart Circ Physiol 2024; 326:H538-H547. [PMID: 38133616 PMCID: PMC11221800 DOI: 10.1152/ajpheart.00669.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 12/07/2023] [Accepted: 12/21/2023] [Indexed: 12/23/2023]
Abstract
With the growing popularity of video gaming, deep vein thromboses are increasingly being reported in gamers. This study aimed to compare the effects of lower leg graduated compression sleeves and a 6-min walking break during prolonged gaming on blood flow and hemodynamics in competitive sport players to help mitigate this risk. Ten healthy gamers (19.6 ± 1.2 yr old; 9 men) consented to participate in this mixed-model crossover design study that consisted of three visits. In visit 1, participants engaged in continuous 2-h video game play wearing no compression (continuous). Visits 2 and 3 involved 2-h play wearing compression sleeves (compression) and 2-h game play interrupted at 1 h by a 6-min walk (walk). Doppler ultrasound measurements of the left popliteal artery were taken at 30, 60, 90, and 120 min, to record vessel diameter, blood flow velocity, and blood flow volume. Participants completed a survey to assess their perception of each approach. There was a significant interaction between conditions for blood flow and blood velocity (P = 0.01, P < 0.001). Post hoc analysis demonstrated a greater decrease in blood flow and blood velocity in the continuous group compared with the walk group at the 90-min mark (P = 0.04, P = 0.01). No differences were found between the compression and walk groups or between the continuous and compression groups (P = 0.42, P = 0.69). No interactions were observed in diameter, mean arterial pressure, or heart rate. This study suggests that incorporating a 6-min walk every 60 min during prolonged gaming is advisable to counteract the negative effects on blood flow hemodynamics.NEW & NOTEWORTHY A 6-min light-intensity walking break during gaming can effectively combat the adverse effects of prolonged sitting, surpassing compression garments. Prolonged sitting reduces blood flow velocity, potentially leading to deep vein thrombosis (DVT). Compression sleeves help, with superior results after a 6-min walk at 60 min. Although compression stockings offer moderate improvements, a 6-min active break proves more effective. These findings offer promising interventions for gamers' health, initiating guidelines to mitigate DVT risk during gaming.
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Affiliation(s)
- Joanne DiFrancisco-Donoghue
- Department of Osteopathic Medicine, New York Institute of Technology College of Osteopathic Medicine, Old Westbury, New York, United States
- Center for Esports Medicine, New York Institute of Technology, Old Westbury, New York, United States
| | - Kelly Borges
- Medical School, New York Institute of Technology College of Osteopathic Medicine, Old Westbury, New York, United States
| | - Timothy Li
- Medical School, New York Institute of Technology College of Osteopathic Medicine, Old Westbury, New York, United States
| | - Olivia Ballone
- Medical School, New York Institute of Technology College of Osteopathic Medicine, Old Westbury, New York, United States
| | - Hallie Zwibel
- Department of Family Medicine, New York Institute of Technology College of Osteopathic Medicine, Old Westbury, New York, United States
- Center for Esports Medicine, New York Institute of Technology, Old Westbury, New York, United States
| | - Peter C Douris
- Department of Physical Therapy, New York Institute of Technology, Old Westbury, New York, United States
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Ferreira-Santos L, Martinez-Lemus LA, Padilla J. Sitting leg vasculopathy: potential adaptations beyond the endothelium. Am J Physiol Heart Circ Physiol 2024; 326:H760-H771. [PMID: 38241008 PMCID: PMC11221807 DOI: 10.1152/ajpheart.00489.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 12/27/2023] [Accepted: 01/18/2024] [Indexed: 02/29/2024]
Abstract
Increased sitting time, the most common form of sedentary behavior, is an independent risk factor for all-cause and cardiovascular disease mortality; however, the mechanisms linking sitting to cardiovascular risk remain largely elusive. Studies over the last decade have led to the concept that excessive time spent in the sitting position and the ensuing reduction in leg blood flow-induced shear stress cause endothelial dysfunction. This conclusion has been mainly supported by studies using flow-mediated dilation in the lower extremities as the measured outcome. In this review, we summarize evidence from classic studies and more recent ones that collectively support the notion that prolonged sitting-induced leg vascular dysfunction is likely also attributable to changes occurring in vascular smooth muscle cells (VSMCs). Indeed, we provide evidence that prolonged constriction of resistance arteries can lead to modifications in the structural characteristics of the vascular wall, including polymerization of actin filaments in VSMCs and inward remodeling, and that these changes manifest in a time frame that is consistent with the vascular changes observed with prolonged sitting. We expect this review will stimulate future studies with a focus on VSMC cytoskeletal remodeling as a potential target to prevent the detrimental vascular ramifications of too much sitting.
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Affiliation(s)
| | - Luis A Martinez-Lemus
- NextGen Precision Health, University of Missouri, Columbia, Missouri, United States
- Department of Medical Pharmacology and Physiology, University of Missouri, Columbia, Missouri, United States
- Center for Precision Medicine, Department of Medicine, University of Missouri, Columbia, Missouri, United States
| | - Jaume Padilla
- NextGen Precision Health, University of Missouri, Columbia, Missouri, United States
- Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, Missouri, United States
- Harry S. Truman Memorial Veterans' Hospital, Columbia, Missouri, United States
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Pinto AJ, Bergouignan A, Dempsey PC, Roschel H, Owen N, Gualano B, Dunstan DW. Physiology of sedentary behavior. Physiol Rev 2023; 103:2561-2622. [PMID: 37326297 PMCID: PMC10625842 DOI: 10.1152/physrev.00022.2022] [Citation(s) in RCA: 32] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 05/10/2023] [Accepted: 06/14/2023] [Indexed: 06/17/2023] Open
Abstract
Sedentary behaviors (SB) are characterized by low energy expenditure while in a sitting or reclining posture. Evidence relevant to understanding the physiology of SB can be derived from studies employing several experimental models: bed rest, immobilization, reduced step count, and reducing/interrupting prolonged SB. We examine the relevant physiological evidence relating to body weight and energy balance, intermediary metabolism, cardiovascular and respiratory systems, the musculoskeletal system, the central nervous system, and immunity and inflammatory responses. Excessive and prolonged SB can lead to insulin resistance, vascular dysfunction, shift in substrate use toward carbohydrate oxidation, shift in muscle fiber from oxidative to glycolytic type, reduced cardiorespiratory fitness, loss of muscle mass and strength and bone mass, and increased total body fat mass and visceral fat depot, blood lipid concentrations, and inflammation. Despite marked differences across individual studies, longer term interventions aimed at reducing/interrupting SB have resulted in small, albeit marginally clinically meaningful, benefits on body weight, waist circumference, percent body fat, fasting glucose, insulin, HbA1c and HDL concentrations, systolic blood pressure, and vascular function in adults and older adults. There is more limited evidence for other health-related outcomes and physiological systems and for children and adolescents. Future research should focus on the investigation of molecular and cellular mechanisms underpinning adaptations to increasing and reducing/interrupting SB and the necessary changes in SB and physical activity to impact physiological systems and overall health in diverse population groups.
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Affiliation(s)
- Ana J Pinto
- Division of Endocrinology, Metabolism, and Diabetes, Anschutz Health and Wellness Center, University of Colorado Anschutz Medical Campus, Aurora, Colorado, United States
- Applied Physiology & Nutrition Research Group, Center of Lifestyle Medicine, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Audrey Bergouignan
- Division of Endocrinology, Metabolism, and Diabetes, Anschutz Health and Wellness Center, University of Colorado Anschutz Medical Campus, Aurora, Colorado, United States
- Institut Pluridisciplinaire Hubert Curien, Centre National de la Recherche Scientifique, Université de Strasbourg, Strasbourg, France
| | - Paddy C Dempsey
- Baker Heart & Diabetes Institute, Melbourne, Victoria, Australia
- Institute for Physical Activity and Nutrition (IPAN), School of Exercise and Nutrition Sciences, Deakin University, Geelong, Victoria, Australia
- MRC Epidemiology Unit, Institute of Metabolic Science, University of Cambridge, Cambridge Biomedical Campus, Cambridge, United Kingdom
- Diabetes Research Centre, College of Life Sciences, University of Leicester, Leicester, United Kingdom
| | - Hamilton Roschel
- Applied Physiology & Nutrition Research Group, Center of Lifestyle Medicine, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Sao Paulo, Brazil
| | - Neville Owen
- Baker Heart & Diabetes Institute, Melbourne, Victoria, Australia
- Centre for Urban Transitions, Swinburne University of Technology, Melbourne, Victoria, Australia
| | - Bruno Gualano
- Applied Physiology & Nutrition Research Group, Center of Lifestyle Medicine, Faculdade de Medicina FMUSP, Universidade de Sao Paulo, Sao Paulo, Brazil
- Food Research Center, University of Sao Paulo, Sao Paulo, Brazil
| | - David W Dunstan
- Baker Heart & Diabetes Institute, Melbourne, Victoria, Australia
- Institute for Physical Activity and Nutrition (IPAN), School of Exercise and Nutrition Sciences, Deakin University, Geelong, Victoria, Australia
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Levine JA. The Fidget Factor and the obesity paradox. How small movements have big impact. Front Sports Act Living 2023; 5:1122938. [PMID: 37077429 PMCID: PMC10106700 DOI: 10.3389/fspor.2023.1122938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 02/24/2023] [Indexed: 04/05/2023] Open
Abstract
The hypothesis is that the Fidget Factor is the innate neurological pulse that propels humans and other species to move to support their health. Fidgets, previously thought to be spontaneous, are neurologically regulated and highly ordered (non-random). Modern societies being chair-based overwhelm Fidget Factor pulses and consequently inflict chair-based living for transportation, labor, and leisure. Despite impulses firing through the nervous system, people sit because environmental design overwhelms the biology. Urbanization and chair-based societies were designed after the industrial revolution to promote productivity; however, the consequence has been opposite. Crushing the natural urge to move—the Fidget Factor—is a public health calamity. Excess sitting is associated with a myriad of detrimental health consequences and impairs productivity. Fidgeting may reduce all-cause mortality associated with excessive sitting. The Fidget Factor offers hope; data demonstrate that workplaces and schools can be designed to promote activity and free people's Fidget Factors. Evidence shows that people are happier, healthier, wealthier, and more successful if their Fidget Factors are freed.
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Pekas EJ, Allen MF, Park SY. Prolonged sitting and peripheral vascular function: potential mechanisms and methodological considerations. J Appl Physiol (1985) 2023; 134:810-822. [PMID: 36794688 PMCID: PMC10042610 DOI: 10.1152/japplphysiol.00730.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 01/23/2023] [Accepted: 02/10/2023] [Indexed: 02/17/2023] Open
Abstract
Sitting time is associated with increased risks for subclinical atherosclerosis and cardiovascular disease development, and this is thought to be partially due to sitting-induced disturbances in macro- and microvascular function as well as molecular imbalances. Despite surmounting evidence supporting these claims, contributing mechanisms to these phenomena remain largely unknown. In this review, we discuss evidence for potential mechanisms of sitting-induced perturbations in peripheral hemodynamics and vascular function and how these potential mechanisms may be targeted using active and passive muscular contraction methods. Furthermore, we also highlight concerns regarding the experimental environment and population considerations for future studies. Optimizing prolonged sitting investigations may allow us to not only better understand the hypothesized sitting-induced transient proatherogenic environment but to also enhance methods and devise mechanistic targets to salvage sitting-induced attenuations in vascular function, which may ultimately play a role in averting atherosclerosis and cardiovascular disease development.
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Affiliation(s)
- Elizabeth J Pekas
- School of Health and Kinesiology, University of Nebraska at Omaha, Omaha, Nebraska, United States
| | - Michael F Allen
- School of Health and Kinesiology, University of Nebraska at Omaha, Omaha, Nebraska, United States
| | - Song-Young Park
- School of Health and Kinesiology, University of Nebraska at Omaha, Omaha, Nebraska, United States
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11
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Arippa F, Nguyen A, Pau M, Harris-Adamson C. Movement Behavior and Health Outcomes among Sedentary Adults: A Cross-Sectional Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2023; 20:4668. [PMID: 36901678 PMCID: PMC10037417 DOI: 10.3390/ijerph20054668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Revised: 03/02/2023] [Accepted: 03/04/2023] [Indexed: 06/18/2023]
Abstract
BACKGROUND Sedentary behavior, which is highly prevalent among office workers, is associated with multiple health disorders, including those of the musculoskeletal and cardiometabolic systems. Although prior studies looked at postures or physical activity during work or leisure time, few analyzed both posture and movement throughout the entire day. OBJECTIVE This cross-sectional pilot study examined the movement behavior of sedentary office workers during both work and leisure time to explore its association with musculoskeletal discomfort (MSD) and cardiometabolic health indicators. METHODS Twenty-six participants completed a survey and wore a thigh-based inertial measuring unit (IMU) to quantify the time spent in different postures, the number of transitions between postures, and the step count during work and leisure time. A heart rate monitor and ambulatory blood pressure cuff were worn to quantify cardiometabolic measures. The associations between movement behavior, MSD, and cardiometabolic health indicators were evaluated. RESULTS The number of transitions differed significantly between those with and without MSD. Correlations were found between MSD, time spent sitting, and posture transitions. Posture transitions had negative correlations with body mass index and heart rate. CONCLUSIONS Although no single behavior was highly correlated with health outcomes, these correlations suggest that a combination of increasing standing time, walking time, and the number of transitions between postures during both work and leisure time was associated with positive musculoskeletal and cardiometabolic health indicators among sedentary office workers and should be considered in future research.
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Affiliation(s)
- Federico Arippa
- School of Public Health, University of California, Berkeley, CA 94720, USA
- Department of Mechanical, Chemical and Materials Engineering, University of Cagliari, 09123 Cagliari, Italy
| | - Athena Nguyen
- School of Public Health, University of California, Berkeley, CA 94720, USA
| | - Massimiliano Pau
- Department of Mechanical, Chemical and Materials Engineering, University of Cagliari, 09123 Cagliari, Italy
| | - Carisa Harris-Adamson
- School of Public Health, University of California, Berkeley, CA 94720, USA
- Department of Medicine, University of California, San Francisco, CA 94143, USA
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12
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Liu H, O'Brien MW, Wu Y, Bustamante CM, Kimmerly DS. An acute bout of prolonged sitting blunts popliteal endothelium-independent dilation in young, healthy adults. J Appl Physiol (1985) 2023; 134:521-528. [PMID: 36656984 DOI: 10.1152/japplphysiol.00712.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
A single bout of prolonged uninterrupted sitting increases oxidative stress, reduces popliteal blood flow-induced shear stress, and diminishes endothelium-dependent, flow-mediated dilation (FMD). The FMD response is also influenced by the sensitivity of vascular smooth muscle cells to nitric oxide (i.e., endothelium-independent dilation), which is also attenuated by elevated oxidative stress. However, it is currently unknown whether prolonged sitting impacts popliteal endothelium-independent dilation responses, which may uncover a novel mechanism associated with sitting-induced vascular dysfunction. This study tested the hypothesis that prolonged sitting attenuates both popliteal FMD and endothelium-independent, nitroglycerin-mediated dilation responses (NMD, 0.4 mg sublingual dose). Popliteal blood flow (mL/min), relative FMD (%), and NMD (%) were assessed via duplex ultrasonography before and after a ∼3-h bout of sitting in 14 young, healthy adults (8♀; 22 ± 2 yr). Prolonged sitting attenuated resting blood flow (57 ± 23 to 32 ± 16 mL/min, P < 0.001), relative FMD (4.6 ± 2.8% to 2.2 ± 2.5%; P = 0.001), and NMD (7.3 ± 4.0% to 4.6 ± 3.0%; P = 0.002). These novel findings demonstrate that both endothelium-dependent and independent mechanisms contribute to the adverse vascular consequences associated with prolonged bouts of sitting.NEW & NOTEWORTHY We demonstrate that lower-limb vascular smooth muscle function is attenuated in young, healthy adults after an acute bout of prolonged sitting. These data indicate that prolonged sitting-induced vascular dysfunction involves both endothelium-dependent and -independent mechanisms.
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Affiliation(s)
- Haoxuan Liu
- Division of Kinesiology, School of Health and Human Performance, Faculty of Health, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Myles W O'Brien
- Division of Kinesiology, School of Health and Human Performance, Faculty of Health, Dalhousie University, Halifax, Nova Scotia, Canada.,Division of Geriatric Medicine, Department of Medicine, School of Physiotherapy, Faculty of Health, Dalhousie University, Halifax, Nova Scotia, Canada.,Geriatric Medicine Research, Dalhousie University and Nova Scotia Health, Halifax, Nova Scotia, Canada
| | - Yanlin Wu
- Division of Kinesiology, School of Health and Human Performance, Faculty of Health, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Carolina M Bustamante
- Division of Kinesiology, School of Health and Human Performance, Faculty of Health, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Derek S Kimmerly
- Division of Kinesiology, School of Health and Human Performance, Faculty of Health, Dalhousie University, Halifax, Nova Scotia, Canada
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13
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O'Rourke N, Meens-Miller E, Jeffrey M, Saleem L, Green-Johnson J, Dogra S. Short bouts of walking attenuates the response of IL-8 to prolonged sitting in healthy adults. Eur J Appl Physiol 2023; 123:1271-1281. [PMID: 36781426 DOI: 10.1007/s00421-023-05153-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Accepted: 02/04/2023] [Indexed: 02/15/2023]
Abstract
PURPOSE Experimental studies have shown that prolonged sitting for 2-8 h can cause changes to vascular and metabolic markers; the response of pro-inflammatory cytokines is relatively unexplored. The purpose of this study is to determine the response of interleukin-8 (IL-8) to prolonged and interrupted sitting. METHODS Healthy participants (n = 24, 21.1 years ± 2.2, 50% female) completed a prolonged sitting session (4 h) and an interrupted sitting session (4 h of sitting with 3 min of walking at 60%HRmax, every 30 min) in random order. Saliva and capillary plasma were collected at the beginning (T1) and at the end of each session (T2). RESULTS Salivary concentrations of IL-8 increased during the prolonged (T1 median: 22.09 pg/mL, T2 median: 86.18 pg/mL; p = < 0.01, ES - 0.55) and interrupted (T1 median: 22.09 pg/mL, T2 median: 51.99 pg/mL; p = 0.021, ES - 0.34) sessions; however, the increase during interrupted sitting was lower (PS median: 134.4%, range: - 43.96 to 1115.69 and IS median: 50.8%, range: - 75.5 to 356.35; p = 0.011, ES - 0.53). In the sub-sample of males, salivary IL-8 did not increase in the interrupted session (T1 median: 22.09, range: 3.496-699.12, and T2 median: 24.96, range: 5.11-533.5, p = > 0.05, ES - 0.16). No significant findings were observed for IL-8 in the plasma. CONCLUSION Prolonged sitting appears to increase concentrations of the pro-inflammatory cytokine IL-8 while interrupting this sitting with short bouts of walking blunts this response. Sex appears to moderate this relationship; however, there appears to be a large amount of individual variability.
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Affiliation(s)
- Nicholas O'Rourke
- Faculty of Health Sciences (Kinesiology), University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, ON, L1G 0C5, Canada
| | - Emmeline Meens-Miller
- Faculty of Health Sciences (Kinesiology), University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, ON, L1G 0C5, Canada
| | - Michael Jeffrey
- Faculty of Science (Biology), University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, ON, L1G 0C5, Canada
| | - Lin Saleem
- Faculty of Science (Biology), University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, ON, L1G 0C5, Canada
| | - Julia Green-Johnson
- Faculty of Science (Biology), University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, ON, L1G 0C5, Canada
| | - Shilpa Dogra
- Faculty of Health Sciences (Kinesiology), University of Ontario Institute of Technology, 2000 Simcoe Street North, Oshawa, ON, L1G 0C5, Canada.
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14
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O’Brien MW, Daley WS, Schwartz BD, Shivgulam ME, Wu Y, Kimmerly DS, Frayne RJ. Characterization of Detailed Sedentary Postures Using a Tri-Monitor ActivPAL Configuration in Free-Living Conditions. SENSORS (BASEL, SWITZERLAND) 2023; 23:587. [PMID: 36679384 PMCID: PMC9866492 DOI: 10.3390/s23020587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 12/10/2022] [Accepted: 01/03/2023] [Indexed: 06/17/2023]
Abstract
Objective monitors such as the activPAL characterize time when the thigh is horizontal as sedentary time. However, there are physiological differences between lying, bent-legged sitting, and straight-legged sitting. We introduce a three-monitor configuration to assess detailed sedentary postures and demonstrate its use in characterizing such positions in free-living conditions. We explored time spent in each sedentary posture between prolonged (>1 h) versus non-prolonged (<1 h) sedentary bouts. In total, 35 healthy adults (16♀, 24 ± 3 years; 24 h/day for 6.8 ± 1.0 days) wore an activPAL accelerometer on their thigh, torso, and shin. Hip and knee joint flexion angle estimates were determined during sedentary bouts using the dot-product method between the torso−thigh and thigh−shin, respectively. Compared to lying (69 ± 60 min/day) or straight-legged sitting (113 ± 100 min/day), most time was spent in bent-legged sitting (439 ± 101 min/day, p < 0.001). Most of the bent-legged sitting time was accumulated in non-prolonged bouts (328 ± 83 vs. 112 ± 63 min/day, p < 0.001). In contrast, similar time was spent in straight-legged sitting and lying between prolonged/non-prolonged bouts (both, p > 0.26). We document that a considerable amount of waking time is accumulated in lying or straight-legged sitting. This methodological approach equips researchers with a means of characterizing detailed sedentary postures in uncontrolled conditions and may help answer novel research questions on sedentariness.
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Affiliation(s)
- Myles W. O’Brien
- School of Physiotherapy (Faculty of Health) & Division of Geriatric Medicine (Faculty of Medicine), Dalhousie University, Halifax, NS B3H 4R2, Canada
- Geriatric Medicine Research, Dalhousie University & Nova Scotia Health, Halifax, NS B3H 4R2, Canada
| | - W. Seth Daley
- Division of Kinesiology, School of Health and Human Performance, Faculty of Health, Dalhousie University, Halifax, NS B3H 4R2, Canada
| | - Beverly D. Schwartz
- Division of Kinesiology, School of Health and Human Performance, Faculty of Health, Dalhousie University, Halifax, NS B3H 4R2, Canada
| | - Madeline E. Shivgulam
- Division of Kinesiology, School of Health and Human Performance, Faculty of Health, Dalhousie University, Halifax, NS B3H 4R2, Canada
| | - Yanlin Wu
- Division of Kinesiology, School of Health and Human Performance, Faculty of Health, Dalhousie University, Halifax, NS B3H 4R2, Canada
| | - Derek S. Kimmerly
- Division of Kinesiology, School of Health and Human Performance, Faculty of Health, Dalhousie University, Halifax, NS B3H 4R2, Canada
| | - Ryan J. Frayne
- Division of Kinesiology, School of Health and Human Performance, Faculty of Health, Dalhousie University, Halifax, NS B3H 4R2, Canada
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15
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Macêdo GAD, Freire YA, Browne RAV, Câmara M, Cabral LLP, Schwade D, Paulo-Pereira R, Silva RDM, Silva AMB, Farias-Junior LF, Duhamel TA, Costa EC. Pre-Frailty Phenotype and Arterial Stiffness in Older Adults Free of Cardiovascular Diseases. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph192013469. [PMID: 36294048 PMCID: PMC9603482 DOI: 10.3390/ijerph192013469] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 10/06/2022] [Accepted: 10/11/2022] [Indexed: 06/02/2023]
Abstract
PURPOSE Arterial stiffness is a subclinical marker of cardiovascular disease (CVD). The pre-frailty phenotype is associated with a higher risk for CVD. This study investigated the association between the pre-frailty phenotype and arterial stiffness in community-dwelling older adults without diagnosed CVD. METHODS In total, 249 community-dwelling older adults aged 60-80 years were included in this cross-sectional study. The pre-frailty phenotype was defined by the standardized Fried criteria (muscle weakness; slow walking speed; low physical activity; unintentional weight loss; self-reported exhaustion). Participants with one or two standardized Fried criteria were classified as pre-frail and those with zero criteria as robust. Arterial stiffness was measured by aortic pulse wave velocity (aPWV). The data were analyzed using the generalized linear model. RESULTS From 249 participants (66.1 ± 5.3 years; 79.5% females), 61.8% (n = 154) were pre-frail and 38.2% (n = 95) robust. Pre-frail older adults had a higher aPWV (β = 0.19 m/s; p = 0.007) compared to their robust peers. CONCLUSIONS The pre-frailty phenotype was associated with higher arterial stiffness in community-dwelling older adults aged 60-80 years. Pre-frail older adults may have a higher risk for CVD.
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Affiliation(s)
- Geovani Araújo Dantas Macêdo
- ExCE Research Group, Department of Physical Education, Federal University of Rio Grande do Norte, Natal 59078-970, RN, Brazil
| | - Yuri Alberto Freire
- ExCE Research Group, Department of Physical Education, Federal University of Rio Grande do Norte, Natal 59078-970, RN, Brazil
- Graduate Program in Health Sciences, Federal University of Rio Grande do Norte, Natal 59012-570, RN, Brazil
| | - Rodrigo Alberto Vieira Browne
- ExCE Research Group, Department of Physical Education, Federal University of Rio Grande do Norte, Natal 59078-970, RN, Brazil
- Graduate Program in Health Sciences, Federal University of Rio Grande do Norte, Natal 59012-570, RN, Brazil
| | - Marcyo Câmara
- ExCE Research Group, Department of Physical Education, Federal University of Rio Grande do Norte, Natal 59078-970, RN, Brazil
- Graduate Program in Health Sciences, Federal University of Rio Grande do Norte, Natal 59012-570, RN, Brazil
| | - Ludmila Lucena Pereira Cabral
- ExCE Research Group, Department of Physical Education, Federal University of Rio Grande do Norte, Natal 59078-970, RN, Brazil
- Graduate Program in Health Sciences, Federal University of Rio Grande do Norte, Natal 59012-570, RN, Brazil
| | - Daniel Schwade
- ExCE Research Group, Department of Physical Education, Federal University of Rio Grande do Norte, Natal 59078-970, RN, Brazil
- Faculty of Kinesiology and Recreation Management, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
- Institute of Cardiovascular Sciences, St. Boniface General Hospital Research Centre, Winnipeg, MB R3T 2N2, Canada
| | - Ronildo Paulo-Pereira
- ExCE Research Group, Department of Physical Education, Federal University of Rio Grande do Norte, Natal 59078-970, RN, Brazil
- Graduate Program in Health Sciences, Federal University of Rio Grande do Norte, Natal 59012-570, RN, Brazil
| | - Raíssa de Melo Silva
- ExCE Research Group, Department of Physical Education, Federal University of Rio Grande do Norte, Natal 59078-970, RN, Brazil
| | - Alana Monteiro Bispo Silva
- ExCE Research Group, Department of Physical Education, Federal University of Rio Grande do Norte, Natal 59078-970, RN, Brazil
| | - Luiz Fernando Farias-Junior
- ExCE Research Group, Department of Physical Education, Federal University of Rio Grande do Norte, Natal 59078-970, RN, Brazil
- Graduate Program in Psychobiology, Federal University of Rio Grande do Norte, Natal 59078-970, RN, Brazil
| | - Todd A. Duhamel
- Faculty of Kinesiology and Recreation Management, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
- Institute of Cardiovascular Sciences, St. Boniface General Hospital Research Centre, Winnipeg, MB R3T 2N2, Canada
| | - Eduardo Caldas Costa
- ExCE Research Group, Department of Physical Education, Federal University of Rio Grande do Norte, Natal 59078-970, RN, Brazil
- Graduate Program in Health Sciences, Federal University of Rio Grande do Norte, Natal 59012-570, RN, Brazil
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16
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Daniele A, Lucas SJE, Rendeiro C. Detrimental effects of physical inactivity on peripheral and brain vasculature in humans: Insights into mechanisms, long-term health consequences and protective strategies. Front Physiol 2022; 13:998380. [PMID: 36237532 PMCID: PMC9553009 DOI: 10.3389/fphys.2022.998380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 08/25/2022] [Indexed: 11/13/2022] Open
Abstract
The growing prevalence of physical inactivity in the population highlights the urgent need for a more comprehensive understanding of how sedentary behaviour affects health, the mechanisms involved and what strategies are effective in counteracting its negative effects. Physical inactivity is an independent risk factor for different pathologies including atherosclerosis, hypertension and cardiovascular disease. It is known to progressively lead to reduced life expectancy and quality of life, and it is the fourth leading risk factor for mortality worldwide. Recent evidence indicates that uninterrupted prolonged sitting and short-term inactivity periods impair endothelial function (measured by flow-mediated dilation) and induce arterial structural alterations, predominantly in the lower body vasculature. Similar effects may occur in the cerebral vasculature, with recent evidence showing impairments in cerebral blood flow following prolonged sitting. The precise molecular and physiological mechanisms underlying inactivity-induced vascular dysfunction in humans are yet to be fully established, although evidence to date indicates that it may involve modulation of shear stress, inflammatory and vascular biomarkers. Despite the steady increase in sedentarism in our societies, only a few intervention strategies have been investigated for their efficacy in counteracting the associated vascular impairments. The current review provides a comprehensive overview of the evidence linking acute and short-term physical inactivity to detrimental effects on peripheral, central and cerebral vascular health in humans. We further examine the underlying molecular and physiological mechanisms and attempt to link these to long-term consequences for cardiovascular health. Finally, we summarize and discuss the efficacy of lifestyle interventions in offsetting the negative consequences of physical inactivity.
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Affiliation(s)
- Alessio Daniele
- School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Samuel J. E. Lucas
- School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham, United Kingdom
- Centre for Human Brain Health, University of Birmingham, Birmingham, United Kingdom
| | - Catarina Rendeiro
- School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham, United Kingdom
- Centre for Human Brain Health, University of Birmingham, Birmingham, United Kingdom
- *Correspondence: Catarina Rendeiro,
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17
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Jones R, McArthur D, McCoy SM, Stoner L, Fryer S, Credeur DP. Impact of Acute Uninterrupted Sitting on Cerebrovascular Hemodynamics. INTERNATIONAL JOURNAL OF EXERCISE SCIENCE 2022; 15:1156-1167. [PMID: 35992187 PMCID: PMC9362887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Reductions in brain blood flow are associated with reduced cognitive function and cerebrovascular disease. Acute periods of uninterrupted sitting can lead to endothelial dysfunction, namely due to a reduction in shear stress and subsequent reduction in nitric oxide bioavailability. Little is known of the impact of sitting on brain health. The purpose was to determine the total brain blood flow response following a 60-minute bout of uninterrupted sitting. Using a parallel design, this study evaluated the impact of 60-minutes of sitting on total brain blood flow. Fifteen participants (n=15; age=24 ± 1yr; BMI=25 ± 1 kg/m2) sat, uninterrupted, for 60-minutes during the SIT protocol. To ascertain the contribution of blood pooling effects on total brain blood flow, ten participants (n=10; age=23±2yr; BMI=27±4 kg/m2) sat in a modified sitting (MOD) for 60-minutes. Finally, thirteen participants (n=13; age=23±3yr; BMI=26±4 kg/m2) remained supine for the duration of the 60-minutes as a time-control (TC). Brain blood flow was quantified through Doppler-ultrasound measurements of blood flow through the internal carotid (ICA) and vertebral (VA) arteries: (ICA blood flow + VA blood flow) × 2. Following the 60-minutes of sitting (SIT), there was a significant reduction in brain blood flow with time (p=0.001, η p 2 =0.05). Total brain blood flow did not significantly change in MOD (p=0.69, η p 2 =0.05) or TC (p=0.06, η p 2 =0.58) conditions. These findings indicate 60-minutes of sitting may alter cerebrovascular hemodynamics characterized by a reduction in total brain blood flow.
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Affiliation(s)
- Raymond Jones
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
- School of Kinesiology and Nutrition, University of Southern Mississippi, Hattiesburg, MS, USA
| | - Dominique McArthur
- School of Kinesiology and Nutrition, University of Southern Mississippi, Hattiesburg, MS, USA
| | - Stephanie M McCoy
- School of Kinesiology and Nutrition, University of Southern Mississippi, Hattiesburg, MS, USA
| | - Lee Stoner
- Department of Exercise and Sport Science, University of North Carolina, Chapel Hill, NC, USA
| | - Simon Fryer
- School of Sport and Exercise, University of Gloucestershire, Gloucester, UK
| | - Daniel P Credeur
- Division of Food, Nutrition, and Exercise Sciences, University of Missouri, Columbia, MO, USA
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18
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Soto-Rodríguez FJ, Cabañas EI, Pérez-Mármol JM. Impact of prolonged sitting interruption strategies on shear rate, flow-mediated dilation and blood flow in adults: A systematic review and meta-analysis of randomized cross-over trials. J Sports Sci 2022; 40:1558-1567. [PMID: 35731706 DOI: 10.1080/02640414.2022.2091347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Prolonged sitting has been shown to affect endothelial function. Strategies that promote interruption of sitting have shown varying results on the shear rate (SR), flow-mediated dilation (FMD) and blood flow (BF). Thus, we conducted a systematic review and meta-analysis to 1) increase the existing knowledge of the impact of sitting interruption in the prevention of endothelial dysfunction in adults and 2) determine the effect of the sitting interruption strategies on SR, FMD, BF. Literature search was carried out through 7 databases. A random effects model was used to provide the overall mean difference with a 95%CI, and forest plots were generated for pooled estimates of each study outcome. Assessment of biases was performed using ROB2 and considerations for crossover trials. Prolonged sitting interruption strategies showed a significant effect in increasing SR (MD: 7.58 s-1; 95% CI: 3.00 to 12.17), FMD (MD: 1.74%; 95% CI: 0.55 to 2.93) and BF (MD: 12.08 ml/min; 95% CI: 7.61 to 16.55) when compared with the uninterrupted prolonged sitting condition. Prolonged sitting interruption strategies significantly increase SR, FMD and BF, therefore, they represent a considerable effective preventive method on endothelial dysfunction caused by acute exposure to uninterrupted prolonged sitting.
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Affiliation(s)
- Francisco Javier Soto-Rodríguez
- Programa de Doctorado en Medicina Clínica y Salud Pública, Universidad de Granada, Granada, Spain.,Facultad de Medicina, Departamento de Medicina Interna, Universidad de La Frontera, Temuco, Chile.,Facultad de Ciencias de la Salud, Carrera de Kinesiología, Universidad Autónoma de Chile, Temuco, Chile
| | - Eva Isidoro Cabañas
- Programa de Doctorado en Medicina Clínica y Salud Pública, Universidad de Granada, Granada, Spain.,Hospital Virgen de las Nieves, Granada, España
| | - José Manuel Pérez-Mármol
- Departamento de Fisioterapia, Facultad de Ciencias de la Salud, Universidad de Granada, Granada, Spain.,Instituto de Investigación Biosanitaria (ibs.GRANADA), Granada, Spain
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19
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Blood glucose responses are associated with prolonged sitting-induced changes in arterial stiffness: a randomized crossover trial. Blood Press Monit 2022; 27:345-348. [PMID: 35687033 DOI: 10.1097/mbp.0000000000000602] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To determine whether the vascular dysfunction response to prolonged sitting combined with hyperglycemia can be mitigated with simple and feasible sitting interruption exercises. METHODS Twenty healthy young adults [50% women, 21 (2) years, BMI of 21.5 (1.6) kg/m2; (SD)] were enrolled in this study. This study included two 3-h prolonged sitting conditions: uninterrupted sitting (CON) and interruptions with 1-min light half-squat exercises every 20 min (EX). In both conditions, participants ingested 75-g glucose before sitting. The primary outcome was brachial-ankle pulse wave velocity (baPWV). RESULTS Linear mixed-effects model analysis revealed a significant interaction effect for baPWV, with a 25% (4.7 m/s) increase for CON and a 1.3% (0.22 m/s) increase for EX. There was also an interaction effect for glucose, with a 60% (57 mg/dl) for CON and a 41% (39 mg/dl) increase for EX. Repeated measures correlation revealed a negligible association between glucose and baPWV for CON (r = -0.04) and a small association for EX (r = 0.32). CONCLUSION Vascular dysfunction occurred for the control but not the exercise condition, suggesting interrupting prolonged sitting with regular, short bouts of exercise may be an effective strategy to protect vascular health.
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20
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Cho MJ, Choi HI, Kim HJ, Bunsawat K, Kunutsor SK, Jae SY. Comparison of the acute effects of ankle bathing versus moderate-intensity aerobic exercise on vascular function in young adults. Appl Physiol Nutr Metab 2022; 47:469-481. [PMID: 35380875 DOI: 10.1139/apnm-2021-0272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We examined the efficacy of ankle bathing versus aerobic exercise to improve vascular function in young adults who were randomized to aerobic exercise (AE) (n = 13, 40%-60% of heart rate reserve), ankle bathing (AB) (n = 15, 43 °C), or a control condition (CON) (n = 14, ankle bathing, 36 °C) for 40 min. Conduit vessel function [brachial artery flow-mediated dilation (FMD)], carotid and femoral artery blood flow and shear rate (SR), and arterial stiffness [carotid-to-femoral pulse wave velocity (cf-PWV), augmentation index (AIx@75), β-stiffness index, and arterial compliance] were evaluated. Compared with CON, AE and AB increased FMD at 30 min and 90 min (interaction: p < 0.05); AB decreased carotid artery blood flow and SR at 30 min, while both AE and AB increased femoral artery blood flow and SR at 30 min and 90 min (interaction: p < 0.05); AE and AB decreased cf-PWV and AIx@75 at 30 min and 90 min (interaction: p < 0.05); and AE improved both carotid and femoral β-stiffness index and arterial compliance, while AB reduced β-stiffness index and increased arterial compliance only in the femoral artery (interaction: p < 0.05). These findings suggest that ankle bathing may serve as an alternative strategy for enhancing vascular function. Novelty: We observed similar improvements in conduit vessel function, femoral artery blood flow and shear rate, and arterial stiffness following ankle bathing and acute aerobic exercise in young adults. These findings have identified ankle bathing as a potential therapeutic strategy for enhancing vascular function, which may be particularly relevant for those with limited ability to engage in regular aerobic exercise.
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Affiliation(s)
- Min Jeong Cho
- Department of Sport Science, University of Seoul, Seoul, Republic of Korea
| | - Ho Il Choi
- Department of Sport Science, University of Seoul, Seoul, Republic of Korea
| | - Hyun Jeong Kim
- Department of Sport Science, University of Seoul, Seoul, Republic of Korea
| | - Kanokwan Bunsawat
- Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, Utah, USA
| | - Setor K Kunutsor
- National Institute for Health Research Bristol Biomedical Research Centre, University Hospitals Bristol NHS Foundation Trust and University of Bristol, Bristol, UK.,Musculoskeletal Research Unit, Translational Health Sciences, Bristol Medical School, University of Bristol, Southmead Hospital, Bristol, UK
| | - Sae Young Jae
- Department of Sport Science, University of Seoul, Seoul, Republic of Korea.,Division of Urban Social Health, Graduate School of Urban Public Health, University of Seoul, Seoul, Republic of Korea
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21
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Sedentary behavior is associated with reduced cardiovagal baroreflex sensitivity in healthy adults. Hypertens Res 2022; 45:1193-1202. [DOI: 10.1038/s41440-022-00904-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 01/24/2022] [Accepted: 02/18/2022] [Indexed: 11/08/2022]
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22
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Trinity JD, Drummond MJ, Fermoyle CC, McKenzie AI, Supiano MA, Richardson RS. Cardiovasomobility: an integrative understanding of how disuse impacts cardiovascular and skeletal muscle health. J Appl Physiol (1985) 2022; 132:835-861. [PMID: 35112929 PMCID: PMC8934676 DOI: 10.1152/japplphysiol.00607.2021] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Cardiovasomobility is a novel concept that encompasses the integration of cardiovascular and skeletal muscle function in health and disease with critical modification by physical activity, or lack thereof. Compelling evidence indicates that physical activity improves health while a sedentary, or inactive, lifestyle accelerates cardiovascular and skeletal muscle dysfunction and hastens disease progression. Identifying causative factors for vascular and skeletal muscle dysfunction, especially in humans, has proven difficult due to the limitations associated with cross-sectional investigations. Therefore, experimental models of physical inactivity and disuse, which mimic hospitalization, injury, and illness, provide important insight into the mechanisms and consequences of vascular and skeletal muscle dysfunction. This review provides an overview of the experimental models of disuse and inactivity and focuses on the integrated responses of the vasculature and skeletal muscle in response to disuse/inactivity. The time course and magnitude of dysfunction evoked by various models of disuse/inactivity are discussed in detail, and evidence in support of the critical roles of mitochondrial function and oxidative stress are presented. Lastly, strategies aimed at preserving vascular and skeletal muscle dysfunction during disuse/inactivity are reviewed. Within the context of cardiovasomobility, experimental manipulation of physical activity provides valuable insight into the mechanisms responsible for vascular and skeletal muscle dysfunction that limit mobility, degrade quality of life, and hasten the onset of disease.
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Affiliation(s)
- Joel D Trinity
- Salt Lake City Veteran Affairs Medical Center Geriatric Research, Education, and Clinical Center, Salt Lake City, Utah.,Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, Utah.,Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah
| | - Micah J Drummond
- Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, Utah.,Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah.,Department of Physical Therapy, University of Utah, Salt Lake City, Utah
| | - Caitlin C Fermoyle
- Salt Lake City Veteran Affairs Medical Center Geriatric Research, Education, and Clinical Center, Salt Lake City, Utah.,Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, Utah
| | - Alec I McKenzie
- Salt Lake City Veteran Affairs Medical Center Geriatric Research, Education, and Clinical Center, Salt Lake City, Utah.,Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, Utah
| | - Mark A Supiano
- Salt Lake City Veteran Affairs Medical Center Geriatric Research, Education, and Clinical Center, Salt Lake City, Utah.,Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, Utah
| | - Russell S Richardson
- Salt Lake City Veteran Affairs Medical Center Geriatric Research, Education, and Clinical Center, Salt Lake City, Utah.,Department of Internal Medicine, Division of Geriatrics, University of Utah, Salt Lake City, Utah.,Department of Nutrition and Integrative Physiology, University of Utah, Salt Lake City, Utah
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23
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Duran AT, Romero E, Diaz KM. Is Sedentary Behavior a Novel Risk Factor for Cardiovascular Disease? Curr Cardiol Rep 2022; 24:393-403. [PMID: 35182312 DOI: 10.1007/s11886-022-01657-w] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/07/2021] [Indexed: 01/16/2023]
Abstract
PURPOSE OF REVIEW Review the most recent evidence on the role of sedentary behavior in the prevention of cardiovascular disease (CVD). RECENT FINDINGS Prospective cohort studies continue to suggest a relationship between sedentary behavior and CVD, but the dose-response association, and the implications of sedentary pattern (vs. total volume) and context on CVD risk require further investigation. Most recent evidence suggests that physical activity influences the association between sedentary time and CVD risk, and that replacing sedentary time with other movement behaviors yields cardiometabolic benefits. Short-term intervention studies have further demonstrated that interrupting prolonged sitting with bouts of physical activity can elicit acute improvements on cardiometabolic biomarkers and vascular function relative to prolonged, uninterrupted sitting, albeit limited evidence exists on the long-term effects. More conclusive evidence regarding the implications of sedentary time on CVD risk is warranted before the optimal sedentary behavior reduction prescription for the prevention of CVD can be elucidated.
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Affiliation(s)
- Andrea T Duran
- Columbia University Irving Medical Center, 622 West 168 Street, New York, NY, 10032, USA.
| | - Emily Romero
- Teachers College, Columbia University, 525 West 120th Street, New York, NY, USA
| | - Keith M Diaz
- Columbia University Irving Medical Center, 622 West 168 Street, New York, NY, 10032, USA
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24
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da Silva GO, Santini LB, Farah BQ, Germano-Soares AH, Correia MA, Ritti-Dias RM. Effects of Breaking Up Prolonged Sitting on Cardiovascular Parameters: A systematic Review. Int J Sports Med 2022; 43:97-106. [PMID: 34535019 DOI: 10.1055/a-1502-6787] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
The aim of this systematic review was to analyze the acute and chronic effects of sitting breaks on cardiovascular parameters. PubMed and Web of Science databases were searched by two independent researchers for relevant studies published until February 2020. Acute or chronic studies reporting the effects of sitting breaks or reduction in sitting time on cardiovascular parameters were examined. The eligibility criteria followed PICOS: Population - Humans ≥ 18 years old; Interventions - Sitting break strategies; Comparisons - Uninterrupted sitting; Outcomes - Cardiovascular parameters (blood pressure, heart rate, ambulatory blood pressure, vascular function, pulse-wave velocity, cerebral blood flow and biomarkers); Study design - Randomized controlled trials, non-randomized non-controlled trials and randomized crossover trials. Forty-five studies were included, where 35 investigated the acute and 10 the chronic effects of sitting breaks or reductions in sitting time. Walking was the main acute study strategy, used in different volumes (1 min 30 s to 30 min), intensities (light to vigorous) and frequencies (every 20 min to every 2 h). Acute studies found improvements on cardiovascular parameters, especially blood pressure, flow-mediated dilation, and biomarkers, whereas chronic studies found improvements mostly on blood pressure. Breaking up or reducing sitting time improves cardiovascular parameters, especially with walking.
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Affiliation(s)
| | - Luiza Batista Santini
- Instituto Israelita de Ensino e Pesquisa, Hospital Israelita Albert Einstein, Sao Paulo, Brazil
| | - Breno Quintella Farah
- Departament of Physical Education, Universidade Federal Rural de Pernambuco, Recife, Brazil
- Post-graduate Program in Physical Education, Universidade Federal de Pernambuco, Recife, Brazil
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25
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Hou J, Li X, Li Z, Yin L, Chen X, Liang F. An In Vivo Data-Based Computational Study on Sitting-Induced Hemodynamic Changes in the External Iliac Artery. J Biomech Eng 2022; 144:1119224. [PMID: 34467394 DOI: 10.1115/1.4052292] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2021] [Indexed: 01/09/2023]
Abstract
Although sedentary behavior (characterized by prolonged sitting without otherwise being active in daily life) is widely regarded as a risk factor for peripheral artery disease (PAD), underlying biomechanical mechanisms remain insufficiently understood. In this study, geometrical models of ten external iliac arteries were reconstructed based on angiographic data acquired from five healthy young subjects resting in supine and sitting (mimicked by side lying with bent legs) positions, respectively, which were further combined with measured blood flow velocity waveforms in the common iliac arteries (with each body posture being maintained for 30 min) to build computational models for simulating intra-arterial hemodynamics. Morphological analyses showed that the external iliac arteries suffered from evident bending deformation upon the switch of body posture from supine to sitting. Measured blood flow velocity waveforms in the sitting position exhibited a marked decrease in mean flow velocity while increase in retrograde flow ratio compared with those in the supine position. Hemodynamic computations further revealed that sitting significantly altered blood flow patterns in the external iliac arteries, leading to a marked enlargement of atheroprone wall regions exposed to low and oscillatory wall shear stress (WSS), and enhanced multidirectional disturbance of WSS that may further impair endothelial function. In summary, our study demonstrates that prolonged sitting induces atheropromoting hemodynamic changes in the external iliac artery due to the combined effects of vascular bending deformation and changes in flow velocity waveform, which may provide important insights for understanding the involvement of biomechanical factors in sedentary behavior-related PAD.
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Affiliation(s)
- Jixin Hou
- State Key Laboratory of Ocean Engineering, School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Key Laboratory of Hydrodynamics (Ministry of Education), School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xuanyu Li
- Key Laboratory of Hydrodynamics (Ministry of Education), School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Zhaojun Li
- Department of Ultrasound, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200080, China
| | - Lekang Yin
- Department of Radiology, Zhongshan Hospital, Fudan University, Shanghai 200032, China
| | - Xin Chen
- Key Laboratory of Hydrodynamics (Ministry of Education), School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Fuyou Liang
- State Key Laboratory of Ocean Engineering, School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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26
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Islam H, Gibala MJ, Little JP. Exercise Snacks: A Novel Strategy to Improve Cardiometabolic Health. Exerc Sport Sci Rev 2022; 50:31-37. [PMID: 34669625 DOI: 10.1249/jes.0000000000000275] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We define exercise snacks as isolated ≤1-min bouts of vigorous exercise performed periodically throughout the day. We hypothesize that exercise snacks are a feasible, well-tolerated, and time-efficient approach to improve cardiorespiratory fitness and reduce the negative impact of sedentary behavior on cardiometabolic health. Efficacy has been demonstrated in small proof-of-concept studies. Additional research should investigate this novel physical activity strategy.
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Affiliation(s)
- Hashim Islam
- School of Health and Exercise Sciences, University of British Columbia Okanagan, Kelowna, BC
| | - Martin J Gibala
- Department of Kinesiology, McMaster University, Hamilton, ON, Canada
| | - Jonathan P Little
- School of Health and Exercise Sciences, University of British Columbia Okanagan, Kelowna, BC
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27
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Taylor FC, Pinto AJ, Maniar N, Dunstan DW, Green DJ. The Acute Effects of Prolonged Uninterrupted Sitting on Vascular Function: A Systematic Review and Meta-analysis. Med Sci Sports Exerc 2022; 54:67-76. [PMID: 34334722 DOI: 10.1249/mss.0000000000002763] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
OBJECTIVE This study aimed to determine the dose-response relationship between prolonged sitting and vascular function in healthy individuals and those with metabolic disturbances and to investigate the acute effects, on vascular function, of interventions that target interrupting prolonged sitting. DESIGN This is a systematic review with meta-analysis. DATA SOURCES Ovid Embase, Ovid Medline, PubMed, and CINAHL were searched from inception to 4 December 2020. ELIGIBILITY CRITERIA Randomized crossover trials, quasi-randomized trials, and parallel group trials where vascular function (flow-mediated dilation [FMD]) was assessed before and after an acute period of sedentary behavior was used in this study. RESULTS Prolonged sitting resulted in a significant decrease in the standardized mean change (SMC) for lower-limb FMD at the 120-min (SMC = -0.85, 95% confidence interval [CI] = -1.32 to -0.38) and 180-min (SMC = -1.18, 95% CI = -1.69 to -0.66) time points. A similar pattern was observed for lower-limb shear rate. No significant changes were observed for any outcomes in the upper limb. Subgroup analysis indicated that prolonged sitting decreased lower-limb FMD in healthy adults (SMC = -1.33, 95% CI = -1.89 to -0.78) who had higher a priori vascular endothelial function, but not in those with metabolic and vascular dysfunction (SMC = -0.51, 95% CI = -1.18 to 0.15). Interrupting sitting with active interruptions increased the standardized mean difference for FMD, relative to prolonged sitting, but it was not statistically significant (0.13, 95% CI = -0.20 to 0.45). CONCLUSIONS Lower-limb vascular function is progressively impaired as a consequence of prolonged sitting, up to 180 min. A similar trend was not observed in upper-limb vascular function. Subgroup analysis indicated that prolonged sitting negatively affects healthy populations, a finding not observed in those with metabolic disturbances. Regularly interrupting sitting with activity may be beneficial for those with metabolic disturbances.
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Affiliation(s)
| | - Ana J Pinto
- Applied Physiology and Nutrition Research Group, Laboratory of Assessment and Conditioning in Rheumatology, School of Physical Education and Sport, Faculdade de Medicina FMUSP, Universidade de São Paulo, São Paulo, BRAZIL
| | | | | | - Daniel J Green
- Department of Exercise and Sport Science, School of Human Sciences, The University of Western Australia, Perth, AUSTRALIA
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28
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O’Brien MW, Wu Y, Petterson JL, Frayne RJ, Kimmerly DS. Ecological Validity of Prolonged Sitting Studies: How Well Do They Represent Real-Life Sedentary Patterns? A Pilot Study. TRANSLATIONAL JOURNAL OF THE AMERICAN COLLEGE OF SPORTS MEDICINE 2022. [DOI: 10.1249/tjx.0000000000000182] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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The immediate effect of harmonic therapy on peripheral blood flow in young males: A cross-over pilot study. INT J OSTEOPATH MED 2021. [DOI: 10.1016/j.ijosm.2021.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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30
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Silva GO, Carvalho JF, Kanegusuku H, Farah BQ, Correia MA, Ritti-Dias RM. Acute effects of breaking up sitting time with isometric exercise on cardiovascular health: Randomized crossover trial. Scand J Med Sci Sports 2021; 31:2044-2054. [PMID: 34270830 DOI: 10.1111/sms.14024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 06/30/2021] [Accepted: 07/13/2021] [Indexed: 11/26/2022]
Abstract
The objective of this study was to analyze the acute effects of breaking up prolonged sitting with isometric exercise on the cardiovascular health of sedentary adults. This is a three-condition randomized crossover trial. The sample was comprised of 17 subjects (11 women; 29 ± 10 years old; 25,1 ± 5,1 kg/m2 ). The participants completed, in randomized order, three experimental conditions (control, breaks with isometric leg extension exercise, and breaks with walking), with the order of the conditions determined through simple automatic randomization. All the conditions had in common a sitting period of 3 h. During the conditions with isometric exercise and walking breaks the participants performed breaks with isometric leg extension exercise and with walking every 30 min, while in the control condition they remained seated with no breaks. Before and after this period, vascular function (primary outcome), blood pressure, and cardiac autonomic modulation (secondary outcomes) were measured. Generalized estimated equations were used to analyze the data. The results did not indicate significant interaction effects for vascular function among experimental conditions (p > 0,05 for all). We also did not find significant interaction effects for systolic or diastolic blood pressure among the conditions (p > 0,05 for all). The heart rate variability parameters did not present significant interaction effects among conditions (p > 0,05 for all). In conclusion, breaking up sitting with isometric exercise does not seem to lead to significant effects on the cardiovascular health of sedentary adults.
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Affiliation(s)
| | | | | | - Breno Q Farah
- Physical Education Department, Rural Federal University of Pernambuco, Recife-PE, Brazil.,Graduate Program in Physical Education, Federal University of Pernambuco (UFPE), Recife, Brazil
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31
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Pettit-Mee RJ, Ready ST, Padilla J, Kanaley JA. Leg Fidgeting During Prolonged Sitting Improves Postprandial Glycemic Control in People with Obesity. Obesity (Silver Spring) 2021; 29:1146-1154. [PMID: 34159757 PMCID: PMC8231734 DOI: 10.1002/oby.23173] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 03/02/2021] [Accepted: 03/03/2021] [Indexed: 11/11/2022]
Abstract
OBJECTIVE Studies have shown that fidgeting augments metabolic demand and increases blood flow to the moving limbs, whereas prolonged sitting suppresses these factors and exacerbates postprandial glucose excursions. Therefore, the hypothesis of this study was that leg fidgeting during prolonged sitting would improve postprandial glycemic control. METHODS Adults with obesity (n = 20) participated in a randomized crossover trial in which blood glucose and insulin concentrations were measured during a 3-hour sitting period following the ingestion of a glucose load (75 g). During sitting, participants either remained stationary or intermittently fidgeted both legs (2.5 minutes off and 2.5 minutes on). Accelerometer counts, oxygen consumption, and popliteal-artery blood flow were also measured during the sitting period. RESULTS As expected, fidgeting increased accelerometer counts (P < 0.01), oxygen consumption (P < 0.01), and blood flow through the popliteal artery (P < 0.05). Notably, fidgeting lowered both glucose (P < 0.01) and insulin (P < 0.05) total area under the curve (AUC) and glucose incremental AUC (P < 0.05). Additionally, there was a strong negative correlation between fidgeting-induced increases in blood flow and reduced postprandial glucose AUC within the first hour (r = -0.569, P < 0.01). CONCLUSIONS Leg fidgeting is a simple, light-intensity physical activity that enhances limb blood flow and can be incorporated during prolonged sitting to improve postprandial glycemic control in people with obesity.
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Affiliation(s)
- Ryan J. Pettit-Mee
- Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, MO
- Dalton Cardiovascular Research Center, University of Missouri, Columbia, MO
| | - Sean T. Ready
- Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, MO
| | - Jaume Padilla
- Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, MO
- Dalton Cardiovascular Research Center, University of Missouri, Columbia, MO
| | - Jill A. Kanaley
- Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, MO
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32
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Kelsch E, Diana JC, Burnet K, Hanson ED, Fryer SF, Credeur DP, Stone KJ, Stoner L. Arterial stiffness responses to prolonged sitting combined with a high-glycemic-index meal: a double-blind, randomized crossover trial. J Appl Physiol (1985) 2021; 131:229-237. [PMID: 34043475 DOI: 10.1152/japplphysiol.00030.2021] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Regular exposure to uninterrupted prolonged sitting and the consumption of high-glycemic-index (HGI) meals is independently associated with increased cardiovascular disease risk. Sitting for as little as 1 h can impair the health of both peripheral and central arteries. However, it is currently unknown whether combined acute exposure to uninterrupted prolonged sitting and an HGI meal is more detrimental to global (peripheral and central) vascular health. The purpose of this study was to investigate the effect of prolonged sitting (3 h), following the consumption of an HGI or a low-glycemic-index (LGI) meal, on global pulse wave velocity (G-PWV). Eighteen healthy participants [70% female, mean (standard deviation, SD) age = 22.6 (3.1) yr, body mass index (BMI) = 25.5 (6.1) kg/m2] sat for 3 h after consuming an HGI or LGI meal. G-PWV was assessed by incorporating three PWV measures (carotid-femoral, brachial-femoral, and femoral-ankle). The effects of time (PRE vs. POST) and condition (LGI vs. HGI) were analyzed using linear mixed models. Following prolonged sitting, G-PWV increased by 0.29 m/s (i.e., PRE vs. POST). However, the condition (P = 0.987) and time × condition (P = 0.954) effects were nonsignificant. The current findings support previous research showing an increase in arterial stiffness with prolonged sitting. However, in young and healthy adults, the arterial stiffness response was not worsened through HGI meal consumption.NEW & NOTEWORTHY We used novel statistical techniques and study design characteristics to examine how the cardiovascular disruptions due to prolonged sitting are changed after the consumption of low- and high-glycemic-index meals. The current study indicates that changes in arterial stiffness due to prolonged sitting are not worsened in young, healthy adults after the consumption of a high-glycemic-index meal.
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Affiliation(s)
- Elizabeth Kelsch
- Department of Exercise and Sport Science, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Jake C Diana
- Department of Exercise and Sport Science, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Kathryn Burnet
- Department of Exercise and Sport Science, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Erik D Hanson
- Department of Exercise and Sport Science, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
| | - Simon F Fryer
- School of Sport and Exercise, University of Gloucestershire, Gloucester, United Kingdom
| | - Daniel P Credeur
- School of Kinesiology and Nutrition, The University of Southern Mississippi, Hattiesburg, Mississippi
| | - Keeron J Stone
- School of Sport and Exercise, University of Gloucestershire, Gloucester, United Kingdom
| | - Lee Stoner
- Department of Exercise and Sport Science, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
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33
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Paterson C, Fryer S, Zieff G, Stone K, Credeur DP, Barone Gibbs B, Padilla J, Parker JK, Stoner L. The Effects of Acute Exposure to Prolonged Sitting, With and Without Interruption, on Vascular Function Among Adults: A Meta-analysis. Sports Med 2021; 50:1929-1942. [PMID: 32757163 DOI: 10.1007/s40279-020-01325-5] [Citation(s) in RCA: 59] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
BACKGROUND Exposure to acute prolonged sitting can result in vascular dysfunction, particularly within the legs. This vascular dysfunction, assessed using flow-mediated dilation (FMD), is likely the consequence of decreased blood flow-induced shear stress. With mixed success, several sitting interruption strategies have been trialled to preserve vascular function. OBJECTIVES The objectives of this meta-analysis were to (1) assess the effects of acute prolonged sitting exposure on vascular function in the upper- and lower-limb arteries, and (2) evaluate the effectiveness of sitting interruption strategies in preserving vascular function. Sub-group analyses were conducted to determine whether artery location or interruption modality explain heterogeneity. DATA SOURCES Electronic databases (PubMed, Web of Science, SPORTDiscus, and Google Scholar) were searched from inception to January 2020. Reference lists of eligible studies and relevant reviews were also checked. STUDY SELECTION Inclusion criteria for objective (1) were: (i) FMD% was assessed pre- and post-sitting; (ii) studies were either randomised-controlled, randomised-crossover, or quasi-experimental trials; (iii) the sitting period was ≥ 1 h; and (iv) participants were healthy non-smoking adults (≥ 18 years), and free of vascular-acting medication and disease at the time of testing. Additional inclusion criteria for objective (2) were: (i) the interruption strategy must have been during the sitting period; (ii) there was a control (uninterrupted sitting) group/arm; and (iii) the interruption strategy must have involved the participants actively moving their lower- or upper-limbs. APPRAISAL AND SYNTHESIS METHODS One thousand eight hundred and two articles were identified, of which 17 (22 trials, n = 269) met inclusion criteria for objective (1). Of those 17 articles, 6 studies (9 trials, n = 127) met the inclusion criteria for objective (2). Weighted mean differences (WMD), 95% confidence intervals (95% CI), and standardised mean difference (SMD) were calculated for all trials using random-effects meta-analysis modelling. SMD was used to determine the magnitude of effect, where < 0.2, 0.2, 0.5, and 0.8 was defined as trivial, small, moderate, and large respectively. RESULTS (1) Random-effects modelling showed uninterrupted bouts of prolonged sitting resulted in a significant decrease in FMD% (WMD = - 2.12%, 95% CI - 2.66 to - 1.59, SMD = 0.84). Subgroup analysis revealed reductions in lower- but not upper-limb FMD%. (2) Random-effects modelling showed that interrupting bouts of sitting resulted in a significantly higher FMD% compared to uninterrupted sitting (WMD = 1.91%, 95% CI 0.40 to 3.42, SMD = 0.57). Subgroup analyses failed to identify an optimum interruption strategy but revealed moderate non-significant effects for aerobic interventions (WMD = 2.17%, 95% CI - 0.34 to 4.67, SMD = 0.69) and simple resistance activities (WMD = 2.40%, 95% CI - 0.08 to 4.88, SMD = 0.55) and a trivial effect for standing interruptions (WMD = 0.24%, 95% CI - 0.90 to 1.38, SMD = 0.16). CONCLUSIONS Exposure to acute prolonged sitting leads to significant vascular dysfunction in arteries of the lower, but not upper, limbs. The limited available data indicate that vascular dysfunction can be prevented by regularly interrupting sitting, particularly with aerobic or simple resistance activities.
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Affiliation(s)
- Craig Paterson
- School of Sport and Exercise, University of Gloucestershire, Gloucester, UK.
| | - Simon Fryer
- School of Sport and Exercise, University of Gloucestershire, Gloucester, UK
| | - Gabriel Zieff
- Department of Exercise and Sports Science, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Keeron Stone
- School of Sport and Exercise, University of Gloucestershire, Gloucester, UK
| | | | - Bethany Barone Gibbs
- Department of Health and Physical Activity, University of Pittsburgh, Pittsburgh, PA, USA
| | - Jaume Padilla
- Department of Nutrition and Exercise Physiology, University of Missouri, Columbia, MO, USA
- Dalton Cardiovascular Research Center, University of Missouri, Columbia, MO, USA
| | - John K Parker
- School of Sport and Exercise, University of Gloucestershire, Gloucester, UK
| | - Lee Stoner
- Department of Exercise and Sports Science, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
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Izzicupo P, Di Baldassarre A, Abelkalns I, Bisenieks U, Sánchez-Pato A, Cánovas-Alvarez FJ, Doupona M, Figueiredo AJ, García-Roca JA, Ghinassi B, Leiva-Arcas A, Meroño L, Paegle A, Radu LE, Rus CM, Rusu OM, Sarmento H, Stonis J, Vaquero-Cristóbal R, Vaz V, Capranica L. Dual Careers of Athletes During COVID-19 Lockdown. Front Psychol 2021; 12:657671. [PMID: 33868131 PMCID: PMC8047065 DOI: 10.3389/fpsyg.2021.657671] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2021] [Accepted: 02/22/2021] [Indexed: 12/25/2022] Open
Abstract
This study aimed to investigate the student-athletes' capability to face the academic, sport, and social challenges during the coronavirus disease 2019 (COVID-19) lockdown and to disclose novel aspects of dual careers. A 32-item online survey encompassing demographic characteristics, sport and university engagement, support and dual-career benefits, physical activity, sitting time, and the time deemed necessary to recover the previous level of performance was developed. Four hundred sixty-seven student-athletes (males: 57%, females: 43%) from 11 countries, competing in 49 different sports (individual: 63.4%, team: 36.6%) at regional (17.5%), national (43.3%), and international (39.2%) levels, and enrolled at high school (21.9%) and university (78.1%) levels completed the survey. During the lockdown, the respondents decreased the time dedicated to sport and academics, although they maintained an active lifestyle. Student-athletes from countries under severe contagion were more likely to train at home, dedicate to academics, and receive support from the coach but less likely receive support from their teachers. With respect to their team sport counterparts, athletes competing in individual sports trained more and were more likely to receive support from their coaches. International athletes showed the highest training time and support from their coaches and as student-athletes. High school students received more support from their coaches and teachers, whereas university students were more likely considering dual careers useful to cope with the COVID-19 pandemic. This study substantiates the relevant role of competitive sports participation in the maintenance of active lifestyles, with student-athletes considering home training and e-learning valuable resources during the lockdown. Furthermore, their sport and academic commitments helped student-athletes cope with the emergency of the COVID-19 pandemic.
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Affiliation(s)
- Pascal Izzicupo
- Department of Medicine and Aging Sciences, University “G. D'Annunzio” of Chieti-Pescara, Chieti, Italy
| | - Angela Di Baldassarre
- Department of Medicine and Aging Sciences, University “G. D'Annunzio” of Chieti-Pescara, Chieti, Italy
| | | | | | - Antonio Sánchez-Pato
- Areté Research Group, Faculty of Sport, Universidad Católica San Antonio de Murcia, Murcia, Spain
| | | | - Mojca Doupona
- Department of Sport Sociology and History, Faculty of Sports, University of Ljubljana, Ljubljana, Slovenia
- European Athlete as Student Network, Ghaxaq, Malta
| | - António J. Figueiredo
- Research Unit for Sport and Physical Activity, Faculty of Sport Sciences and Physical Education, University of Coimbra, Coimbra, Portugal
| | - Juan Alfonso García-Roca
- Areté Research Group, Faculty of Sport, Universidad Católica San Antonio de Murcia, Murcia, Spain
| | - Barbara Ghinassi
- Department of Medicine and Aging Sciences, University “G. D'Annunzio” of Chieti-Pescara, Chieti, Italy
| | - Alejandro Leiva-Arcas
- Areté Research Group, Faculty of Sport, Universidad Católica San Antonio de Murcia, Murcia, Spain
| | - Lourdes Meroño
- Areté Research Group, Faculty of Sport, Universidad Católica San Antonio de Murcia, Murcia, Spain
| | | | - Liliana-Elisabeta Radu
- Faculty of Physical Education and Sport, University “Alexandru Ioan Cuza”, Iaşi, Romania
| | - Cristian-Mihail Rus
- Faculty of Physical Education and Sport, University “Alexandru Ioan Cuza”, Iaşi, Romania
| | - Oana-Mihaela Rusu
- Faculty of Physical Education and Sport, University “Alexandru Ioan Cuza”, Iaşi, Romania
| | - Hugo Sarmento
- Research Unit for Sport and Physical Activity, Faculty of Sport Sciences and Physical Education, University of Coimbra, Coimbra, Portugal
| | | | - Raquel Vaquero-Cristóbal
- Injury Prevention in Sport Research Group, Faculty of Sport, Universidad Católica San Antonio de Murcia, Murcia, Spain
| | - Vasco Vaz
- Research Unit for Sport and Physical Activity, Faculty of Sport Sciences and Physical Education, University of Coimbra, Coimbra, Portugal
| | - Laura Capranica
- European Athlete as Student Network, Ghaxaq, Malta
- Department of Movement, Human and Health Sciences, University of Rome Foro Italico, Rome, Italy
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35
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Taylor FC, Dunstan DW, Fletcher E, Townsend MK, Larsen RN, Rickards K, Maniar N, Buman M, Dempsey PC, Joham AE, Cohen N, Owen N, Moran LJ, Green DJ. Interrupting Prolonged Sitting and Endothelial Function in Polycystic Ovary Syndrome. Med Sci Sports Exerc 2021; 53:479-486. [PMID: 32925494 DOI: 10.1249/mss.0000000000002513] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
PURPOSE In healthy adults, the impairment of vascular function associated with prolonged sitting can be mitigated with intermittent brief bouts of activity. It is unknown whether these benefits extend to women with polycystic ovary syndrome (PCOS), in whom vascular function is typically impaired and sitting time is high. We examined the acute effect of regularly interrupting sitting time with brief simple resistance activities (SRA) on vascular function in PCOS. METHODS In a randomized crossover trial, 13 physically inactive women with PCOS (18-45 yr) completed two 3.5-h conditions: 1) uninterrupted sitting (SIT) and 2) sitting interrupted by 3-min bouts of SRA every 30 min. Femoral artery flow-mediated dilation (FMD), resting shear rate, and resting blood flow were measured at 0, 1, and 3.5 h. RESULTS Mean resting femoral shear rate, averaged across the 3.5 h, significantly increased in the SRA condition relative to the SIT condition (40.1 ± 6.1 vs 62.8 ± 6.1 s-1, P < 0.0001). In addition, mean resting blood flow also significantly increased across the 3.5 h for SRA relative to SIT (45.0 ± 9.8 vs 72.8 ± 9.9 mL·min-1, P < 0.0001). There were no differences between conditions in the temporal change in femoral artery FMD across 3.5 h (Ptime-condition > 0.05 for all). CONCLUSION Frequently interrupting sitting with SRA acutely increased resting shear rate and blood flow in women with PCOS but did not alter FMD. With sedentary behavior increasing in prevalence, longer-term studies of similar interventions to reduce and break up sitting time are warranted.
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Affiliation(s)
| | | | - Elly Fletcher
- Baker Heart and Diabetes Institute, Melbourne, Victoria, AUSTRALIA
| | | | - Robyn N Larsen
- School of Agriculture and Food, The University of Melbourne, Melbourne, Victoria, AUSTRALIA
| | - Kym Rickards
- Baker Heart and Diabetes Institute, Melbourne, Victoria, AUSTRALIA
| | - Nirav Maniar
- School of Behavioural and Health Sciences, Australian Catholic University, Melbourne, Victoria, AUSTRALIA
| | - Matthew Buman
- College of Health Solutions, Arizona State University, Phoenix, AZ
| | | | - Anju E Joham
- Monash Centre for Health Research and Implementation, School of Public Health and Preventive Medicine, Monash University, Melbourne, Victoria, AUSTRALIA
| | - Neale Cohen
- Baker Heart and Diabetes Institute, Melbourne, Victoria, AUSTRALIA
| | | | - Lisa J Moran
- Monash Centre for Health Research and Implementation, School of Public Health and Preventive Medicine, Monash University, Melbourne, Victoria, AUSTRALIA
| | - Daniel J Green
- School of Human Sciences (Exercise and Sports Science), The University of Western Australia, Perth, Western Australia, AUSTRALIA
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36
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Horiuchi M, Stoner L. Effects of compression stockings on lower-limb venous and arterial system responses to prolonged sitting: A randomized cross-over trial. Vasc Med 2021; 26:386-393. [DOI: 10.1177/1358863x20988899] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Exposure to prolonged sitting increases blood pooling and the risk of lower-extremity vascular arterial and venous complications, including deep vein thrombosis. Compression garment stockings (CGS) may prevent pooling, thereby mitigating the associated vascular complications. Three aims were addressed: (i) does use of CGS help to prevent blood pooling; (ii) does blood pooling correlate with decreased stroke volume; and (iii) does use of CGS preserve leg arterial flow-mediated dilation and reactive hyperemia response. Twenty inactive participants (22 ± 4 years, 30% female, 22.1 ± 2.0 kg/m2) were randomized to sit for 3 hours with (CGS) and without use of CGS. Blood pooling was determined using medial gastrocnemius total hemoglobin. Stroke volume was estimated using finger photoplethysmography, respectively. Macrovascular and microvascular function were measured using popliteal artery flow-mediated dilation and reactive hyperemia, respectively. In response to 3 hours of sitting: (i) there was an interaction effect for total hemoglobin ( p < 0.001); the condition without use of CGS increased 10.5% (95% CI: 6.7 to 14.3) and CGS increased 4.3% (95% CI: 0.1 to 7.7); (ii) blood pooling was negatively associated with stroke volume ( r = −0.58, 95% CI: −0.68 to −0.45); (iii) reactive hyperemia and flow-mediated arterial dilation was impaired after prolonged sitting, and use of CGS was not associated with attenuation of this impairment. Use of CGS decreases blood pooling but does not preserve arterial macrovascular and microvascular responses to prolonged sitting. Further study is warranted to determine whether CGS has additive benefits when combined with sitting interruption strategies.
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Affiliation(s)
- Masahiro Horiuchi
- Division of Human Environmental Science, Mount Fuji Research Institute, Fuji-yoshida City, Yamanashi, Japan
| | - Lee Stoner
- Department of Exercise and Sports Science, University of North Carolina, Chapel Hill, NC, USA
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37
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Decker KP, Feliciano PG, Kimmel MT, Hogwood AC, Weggen JB, Darling AM, Richardson JW, Garten RS. Examining sex differences in sitting-induced microvascular dysfunction: Insight from acute vitamin C supplementation. Microvasc Res 2021; 135:104147. [PMID: 33610562 DOI: 10.1016/j.mvr.2021.104147] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 02/09/2021] [Accepted: 02/13/2021] [Indexed: 01/22/2023]
Abstract
PURPOSE Lower limb microvascular dysfunction resulting from prolonged sitting (PS) bouts has been revealed to occur independent of sex. Although acute antioxidant supplementation has been reported to blunt conduit artery dysfunction following PS in young males, it is unknown if this protective effect extends to the microvasculature or is relevant in young females, who possess intrinsic vascular protective mechanisms specific to antioxidant defense. Therefore, this study employed an acute antioxidant supplementation to further examine sex differences during PS with a specific focus on microvascular function. METHODS On two separate visits, 14 females (23 ± 3 years) and 12 males (25 ± 4 years) had leg microvascular function (LMVF) assessed (via the passive leg movement technique) before and after 1.5 h of sitting. Prior to each visit, one gram of vitamin C (VC) or placebo (PL) was consumed. RESULTS PS significantly reduced LMVF [PL: (M: -34 ± 20; F: -23 ± 18%; p < 0.01) independent of sex (p = 0.7)], but the VC condition only blunted this reduction in males (VC: -3 ± 20%; p < 0.01), but not females (VC: -18 ± 25%; p = 0.5). CONCLUSION Young males and females reported similar reductions LMVF following PS, but only the young males reported a preservation of LMVF following the VC supplementation. This finding in young females was highlighted by substantial variability in LMVF measures in response to the VC condition that was unrelated to changes in the potential contributors to sitting-induced reductions in LMVF (e.g. lower limb venous pooling, reduced arterial shear rate). NEW AND NOTEWORTHY In this study, we employed an acute Vitamin C (VC) supplementation to examine sex differences in leg microvascular function (LMVF) following a bout of prolonged sitting. This study revealed that prolonged sitting reduced LMVF independent of sex, but only young males reported an attenuation to this lowered LMVF following VC supplementation. The young females revealed substantial variability in sitting-induced changes to LMVF that could not be explained by the potential contributors to sitting-induced reductions in LMVF (e.g. lower limb venous pooling, reduced arterial shear rate).
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Affiliation(s)
- Kevin P Decker
- Department of Kinesiology and Health Sciences, Virginia Commonwealth University, Richmond, VA, USA
| | - Patrick G Feliciano
- Department of Kinesiology and Health Sciences, Virginia Commonwealth University, Richmond, VA, USA
| | - Morgan T Kimmel
- Department of Kinesiology and Health Sciences, Virginia Commonwealth University, Richmond, VA, USA
| | - Austin C Hogwood
- Department of Kinesiology, University of Virginia, Charlottesville, VA, USA
| | - Jennifer B Weggen
- Department of Kinesiology and Health Sciences, Virginia Commonwealth University, Richmond, VA, USA
| | - Ashley M Darling
- Department of Kinesiology, University of Texas at Arlington, Arlington, TX, USA
| | - Jacob W Richardson
- Department of Kinesiology and Health Sciences, Virginia Commonwealth University, Richmond, VA, USA
| | - Ryan S Garten
- Department of Kinesiology and Health Sciences, Virginia Commonwealth University, Richmond, VA, USA.
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38
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Bäck M, Michel JB. From organic and inorganic phosphates to valvular and vascular calcifications. Cardiovasc Res 2021; 117:2016-2029. [PMID: 33576771 PMCID: PMC8318101 DOI: 10.1093/cvr/cvab038] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2020] [Revised: 11/26/2020] [Accepted: 02/03/2021] [Indexed: 02/06/2023] Open
Abstract
Calcification of the arterial wall and valves is an important part of the pathophysiological process of peripheral and coronary atherosclerosis, aortic stenosis, ageing, diabetes, and chronic kidney disease. This review aims to better understand how extracellular phosphates and their ability to be retained as calcium phosphates on the extracellular matrix initiate the mineralization process of arteries and valves. In this context, the physiological process of bone mineralization remains a human model for pathological soft tissue mineralization. Soluble (ionized) calcium precipitation occurs on extracellular phosphates; either with inorganic or on exposed organic phosphates. Organic phosphates are classified as either structural (phospholipids, nucleic acids) or energetic (corresponding to phosphoryl transfer activities). Extracellular phosphates promote a phenotypic shift in vascular smooth muscle and valvular interstitial cells towards an osteoblast gene expression pattern, which provokes the active phase of mineralization. A line of defense systems protects arterial and valvular tissue calcifications. Given the major roles of phosphate in soft tissue calcification, phosphate mimetics, and/or prevention of phosphate dissipation represent novel potential therapeutic approaches for arterial and valvular calcification.
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Affiliation(s)
- Magnus Bäck
- Division of Valvular and Coronary Disease, Department of Cardiology, Karolinska University Hospital, 141 86 Stockholm, Sweden.,Department of Medicine, Karolinska Institutet, Stockholm, Sweden.,University of Lorraine, Nancy University Hospital, INSERM U1116, Nancy, France
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39
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Jadidi M, Razian SA, Anttila E, Doan T, Adamson J, Pipinos M, Kamenskiy A. Comparison of morphometric, structural, mechanical, and physiologic characteristics of human superficial femoral and popliteal arteries. Acta Biomater 2021; 121:431-443. [PMID: 33227490 PMCID: PMC7855696 DOI: 10.1016/j.actbio.2020.11.025] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 11/12/2020] [Accepted: 11/17/2020] [Indexed: 01/03/2023]
Abstract
Peripheral arterial disease differentially affects the superficial femoral (SFA) and the popliteal (PA) arteries, but their morphometric, structural, mechanical, and physiologic differences are poorly understood. SFAs and PAs from 125 human subjects (age 13-92, average 52±17 years) were compared in terms of radii, wall thickness, and opening angles. Structure and vascular disease were quantified using histology, mechanical properties were determined with planar biaxial extension, and constitutive modeling was used to calculate the physiologic stress-stretch state, elastic energy, and the circumferential physiologic stiffness. SFAs had larger radii than PAs, and both segments widened with age. Young SFAs were 5% thicker, but in old subjects the PAs were thicker. Circumferential (SFA: 96→193°, PA: 105→139°) and longitudinal (SFA: 139→306°, PA: 133→320°) opening angles increased with age in both segments. PAs were more diseased than SFAs and had 11% thicker intima. With age, intimal thickness increased 8.5-fold, but medial thickness remained unchanged (620μm) in both arteries. SFAs had 30% more elastin than the PAs, and its density decreased ~50% with age. SFAs were more compliant than PAs circumferentially, but there was no difference longitudinally. Physiologic circumferential stress and stiffness were 21% and 11% higher in the SFA than in the PA across all ages. The stored elastic energy decreased with age (SFA: 1.4→0.4kPa, PA: 2.5→0.3kPa). While the SFA and PA demonstrate appreciable differences, most of them are due to vascular disease. When pathology is the same, so are the mechanical properties, but not the physiologic characteristics that remain distinct due to geometrical differences.
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Affiliation(s)
- Majid Jadidi
- Department of Mechanical and Materials Engineering, University of Nebraska-Lincoln, Lincoln, NE, USA
| | - Sayed Ahmadreza Razian
- Department of Biomechanics, Biomechanics Research Building, University of Nebraska Omaha, Omaha, NE, USA
| | - Eric Anttila
- Department of Mechanical and Materials Engineering, University of Nebraska-Lincoln, Lincoln, NE, USA
| | - Tyler Doan
- Department of Biomechanics, Biomechanics Research Building, University of Nebraska Omaha, Omaha, NE, USA
| | - Josiah Adamson
- Department of Biomechanics, Biomechanics Research Building, University of Nebraska Omaha, Omaha, NE, USA
| | - Margarita Pipinos
- Department of Biomechanics, Biomechanics Research Building, University of Nebraska Omaha, Omaha, NE, USA
| | - Alexey Kamenskiy
- Department of Biomechanics, Biomechanics Research Building, University of Nebraska Omaha, Omaha, NE, USA.
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40
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Caldwell HG, Coombs GB, Rafiei H, Ainslie PN, Little JP. Hourly staircase sprinting exercise "snacks" improve femoral artery shear patterns but not flow-mediated dilation or cerebrovascular regulation: a pilot study. Appl Physiol Nutr Metab 2020; 46:521-529. [PMID: 33242251 DOI: 10.1139/apnm-2020-0562] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Healthy males (n = 10; age: 24 ± 4 years; body mass index: 24 ± 2 kg·m-2) completed 2 randomized conditions separated by ≥48 h involving 6-8.5 h of sitting with ("stair snacks") and without (sedentary) hourly staircase sprint interval exercise (∼14-20 s each). Resting blood flow and shear rates were measured in the femoral artery, internal carotid artery, and vertebral artery (Duplex ultrasound). Flow-mediated dilation (FMD) was quantified as an index of peripheral endothelial function in the femoral artery. Neurovascular coupling (NVC; regional blood flow response to local increases in cerebral metabolism) was assessed in the posterior cerebral artery (transcranial Doppler ultrasound). Femoral artery hemodynamics were higher following the active trial with no change in the sedentary trial, including blood flow (+32 ± 23% vs. -10 ± 28%; P = 0.015 and P = 0.253, respectively), vascular conductance (+32 ± 27% vs. -15 ± 26%; P = 0.012 and P = 0.098, respectively), and mean shear rate (+17 ± 8% vs. -8 ± 28%; P = 0.004 and P = 0.310, respectively). The change in FMD was not different within or between conditions (P = 0.184). Global cerebral blood flow (CBF), conductance, shear patterns, and NVC were not different within or between conditions (all P > 0.05). Overall, exercise "stair snacks" improve femoral artery blood flow and shear patterns but not peripheral (e.g., FMD) or cerebral (e.g., CBF and NVC) vascular function following prolonged sitting. The study was registered at ClinicalTrials.gov (NCT03374436). Novelty: Breaking up 8.5 h of sitting with hourly staircase sprinting exercise "snacks" improves resting femoral artery shear patterns but not FMD. Cerebral blood flow and neurovascular coupling were unaltered following 6 h of sitting with and without hourly exercise breaks.
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Affiliation(s)
- Hannah G Caldwell
- Centre for Heart, Lung and Vascular Health, School of Health and Exercise Sciences, The University of British Columbia, Okanagan, Kelowna, Canada.,Centre for Heart, Lung and Vascular Health, School of Health and Exercise Sciences, The University of British Columbia, Okanagan, Kelowna, Canada
| | - Geoff B Coombs
- Centre for Heart, Lung and Vascular Health, School of Health and Exercise Sciences, The University of British Columbia, Okanagan, Kelowna, Canada.,Centre for Heart, Lung and Vascular Health, School of Health and Exercise Sciences, The University of British Columbia, Okanagan, Kelowna, Canada
| | - Hossein Rafiei
- Centre for Heart, Lung and Vascular Health, School of Health and Exercise Sciences, The University of British Columbia, Okanagan, Kelowna, Canada.,Centre for Heart, Lung and Vascular Health, School of Health and Exercise Sciences, The University of British Columbia, Okanagan, Kelowna, Canada
| | - Philip N Ainslie
- Centre for Heart, Lung and Vascular Health, School of Health and Exercise Sciences, The University of British Columbia, Okanagan, Kelowna, Canada.,Centre for Heart, Lung and Vascular Health, School of Health and Exercise Sciences, The University of British Columbia, Okanagan, Kelowna, Canada
| | - Jonathan P Little
- Centre for Heart, Lung and Vascular Health, School of Health and Exercise Sciences, The University of British Columbia, Okanagan, Kelowna, Canada.,Centre for Heart, Lung and Vascular Health, School of Health and Exercise Sciences, The University of British Columbia, Okanagan, Kelowna, Canada
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41
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Taylor FC, Dunstan DW, Homer AR, Dempsey PC, Kingwell BA, Climie RE, Owen N, Cohen ND, Larsen RN, Grace M, Eikelis N, Wheeler MJ, Townsend MK, Maniar N, Green DJ. Acute effects of interrupting prolonged sitting on vascular function in type 2 diabetes. Am J Physiol Heart Circ Physiol 2020; 320:H393-H403. [PMID: 33164575 DOI: 10.1152/ajpheart.00422.2020] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
In healthy and overweight/obese adults, interrupting prolonged sitting with activity bouts mitigates impairment in vascular function. However, it is unknown whether these benefits extend to those with type 2 diabetes (T2D), nor whether an optimal frequency of activity interruptions exist. We examined the acute effects on vascular function in T2D of interrupting prolonged sitting with simple resistance activities (SRA) at different frequencies. In a randomized crossover trial, 24 adults with T2D (35-70 yr) completed three 7-h conditions: 1) uninterrupted sitting (SIT), 2) sitting with 3-min bouts of SRA every 30 min (SRA3), and 3) sitting with 6 min bouts of SRA every 60 min (SRA6). Femoral artery flow-mediated dilation (FMD), resting shear rate, blood flow, and endothelin-1 were measured at 0, 1, 3.5, 4.5, and 6.5-7 h. Mean femoral artery FMD over 7 h was significantly higher in SRA3 (4.1 ± 0.3%) compared with SIT (3.7 ± 0.3%, P = 0.04) but not in SRA6. Mean resting femoral shear rate over 7 h was increased significantly for SRA3 (45.3 ± 4.1/s, P < 0.001) and SRA6 (46.2 ± 4.1/s, P < 0.001) relative to SIT (33.1 ± 4.1/s). Endothelin-1 concentrations were not statistically different between conditions. Interrupting sitting with activity breaks every 30 min, but not 60 min, significantly increased mean femoral artery FMD over 7 h, relative to SIT. Our findings suggest that more frequent and shorter breaks may be more beneficial than longer, less frequent breaks for vascular health in those with T2D.NEW & NOTEWORTHY This is the first trial to examine both the effects of interrupting prolonged sitting on vascular function in type 2 diabetes and the effects of the frequency and duration of interruptions. Brief, simple resistance activity bouts every 30 min, but not every 60 min, increased mean femoral artery flow-mediated dilation over 7 h, relative to uninterrupted sitting. With further supporting evidence, these initial findings can have important implications for cardiovascular health in type 2 diabetes.
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Affiliation(s)
- Frances C Taylor
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia.,Mary MacKillop Institute for Health Research, Australian Catholic University, Melbourne, Victoria, Australia
| | - David W Dunstan
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia.,Mary MacKillop Institute for Health Research, Australian Catholic University, Melbourne, Victoria, Australia.,School of Sport Science, Exercise and Health, University of Western Australia, Perth, Australia
| | - Ashleigh R Homer
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia.,Mary MacKillop Institute for Health Research, Australian Catholic University, Melbourne, Victoria, Australia
| | - Paddy C Dempsey
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia.,Institute of Metabolic Science, University of Cambridge, Cambridge, United Kingdom.,Diabetes Research Centre, University of Leicester, Leicester General Hospital, Leicester, United Kingdom
| | - Bronwyn A Kingwell
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia.,CSL Limited, Bio21, Parkville, Victoria, Australia
| | - Rachel E Climie
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
| | - Neville Owen
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia.,Centre for Urban Transitions, Swinburne University of Technology, Melbourne, Victoria, Australia
| | - Neale D Cohen
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia
| | - Robyn N Larsen
- School of Agriculture and Food, The University of Melbourne, Melbourne, Victoria, Australia
| | - Megan Grace
- School of Clinical Medicine, University of Queensland, Brisbane, Queensland, Australia
| | - Nina Eikelis
- Iverson Health Innovation Research Institute and School of Health Science, Swinburne University of Technology, Melbourne, Victoria, Australia
| | - Michael J Wheeler
- Baker Heart and Diabetes Institute, Melbourne, Victoria, Australia.,School of Sport Science, Exercise and Health, University of Western Australia, Perth, Australia
| | | | - Nirav Maniar
- School of Behavioural and Health Sciences, Australian Catholic University, Australia
| | - Daniel J Green
- School of Sport Science, Exercise and Health, University of Western Australia, Perth, Australia
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42
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Pereira MA, Mullane SL, Toledo MJL, Larouche ML, Rydell SA, Vuong B, Feltes LH, Mitchell NR, de Brito JN, Hasanaj K, Carlson NG, Gaesser GA, Crespo NC, Oakes JM, Buman MP. Efficacy of the 'Stand and Move at Work' multicomponent workplace intervention to reduce sedentary time and improve cardiometabolic risk: a group randomized clinical trial. Int J Behav Nutr Phys Act 2020; 17:133. [PMID: 33109190 PMCID: PMC7592578 DOI: 10.1186/s12966-020-01033-3] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Accepted: 10/01/2020] [Indexed: 12/20/2022] Open
Abstract
Background Sedentary time is associated with chronic disease and premature mortality. We tested a multilevel workplace intervention with and without sit-stand workstations to reduce sedentary time and lower cardiometabolic risk. Methods Stand and Move at Work was a group (cluster) randomized trial conducted between January 2016 and December 2017 among full-time employees; ≥18 years; and in academic, industry/healthcare, and government worksites in Phoenix, Arizona and Minneapolis/St. Paul, Minnesota, USA. Eligible worksites were randomized to (a) MOVE+, a multilevel intervention targeting reduction in sedentary time and increases in light physical activity (LPA); or (b) STAND+, the MOVE+ intervention along with sit-stand workstations to allow employees to sit or stand while working. The primary endpoints were objectively-measured workplace sitting and LPA at 12 months. The secondary endpoint was a clustered cardiometabolic risk score (blood pressure, glucose, insulin, triglycerides, and HDL-cholesterol) at 12 months. Results Worksites (N = 24; academic [n = 8], industry/healthcare [n = 8], and government [n = 8] sectors) and employees (N = 630; 27 ± 8 per worksite; 45 ± 11 years of age, 74% female) were enrolled. All worksites were retained and 487 participants completed the intervention and provided data for the primary endpoint. The adjusted between arm difference in sitting at 12 months was − 59.2 (CI: − 74.6,-43.8) min per 8 h workday, favoring STAND+, and in LPA at 12 months was + 2.2 (− 0.9,5.4) min per 8 h workday. Change in the clustered metabolic risk score was small and not statistically significant, but favored STAND+. In an exploratory subgroup of 95 participants with prediabetes or diabetes, the effect sizes were larger and clinically meaningful, all favoring STAND+, including blood glucose, triglycerides, systolic blood pressure, glycated hemoglobin, LDL-cholesterol, body weight, and body fat. Conclusions Multilevel workplace interventions that include the use of sit-stand workstations are effective for large reductions in sitting time over 12 months. Among those with prediabetes or diabetes, clinical improvements in cardiometabolic risk factors and body weight may be realized. Trial registration ClinicalTrials.gov Identifier: NCT02566317. Registered 2 October 2015, first participant enrolled 11 January 2016.
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Affiliation(s)
- Mark A Pereira
- University of Minnesota, School of Public Health, 1300 South Second Street, Minneapolis, MN, 55455, USA.
| | - Sarah L Mullane
- Arizona State University, College of Health Solutions, 500 North 3rd Street, Phoenix, AZ, 85004, USA
| | | | - Miranda L Larouche
- Arizona State University, College of Health Solutions, 500 North 3rd Street, Phoenix, AZ, 85004, USA
| | - Sarah A Rydell
- University of Minnesota, School of Public Health, 1300 South Second Street, Minneapolis, MN, 55455, USA
| | | | | | - Nathan R Mitchell
- University of Minnesota, School of Public Health, 1300 South Second Street, Minneapolis, MN, 55455, USA
| | - Junia N de Brito
- University of Minnesota, School of Public Health, 1300 South Second Street, Minneapolis, MN, 55455, USA
| | - Kristina Hasanaj
- Arizona State University, College of Health Solutions, 500 North 3rd Street, Phoenix, AZ, 85004, USA
| | - Neil G Carlson
- University of Minnesota, School of Public Health, 1300 South Second Street, Minneapolis, MN, 55455, USA
| | - Glenn A Gaesser
- Arizona State University, College of Health Solutions, 500 North 3rd Street, Phoenix, AZ, 85004, USA
| | | | - J Michael Oakes
- University of Minnesota, School of Public Health, 1300 South Second Street, Minneapolis, MN, 55455, USA
| | - Matthew P Buman
- Arizona State University, College of Health Solutions, 500 North 3rd Street, Phoenix, AZ, 85004, USA.
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Browne RAV, Macêdo GAD, Cabral LLP, Oliveira GTA, Vivas A, Fontes EB, Elsangedy HM, Costa EC. Initial impact of the COVID-19 pandemic on physical activity and sedentary behavior in hypertensive older adults: An accelerometer-based analysis. Exp Gerontol 2020; 142:111121. [PMID: 33132145 PMCID: PMC7580700 DOI: 10.1016/j.exger.2020.111121] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Revised: 10/02/2020] [Accepted: 10/13/2020] [Indexed: 01/08/2023]
Abstract
Background This study reports the accelerometer-based physical activity (PA) and sedentary behavior (SB) before and during the COVID-19 pandemic in hypertensive older adults. Methods Thirty-five hypertensive older adults were included in this observational study. Accelerometer-based PA and SB measures were assessed before (January to March 2020) and during (June 2020) the COVID-19 pandemic. Linear mixed models were used to assess within-group changes in PA and SB measures, adjusted by accelerometer wear time. Results Before COVID-19 pandemic participants presented: 5809 steps/day (SE = 366), 303.1 min/day (SE = 11.9) of light PA, 15.5 min/day (SE = 2.2) of moderate-vigorous PA, and 653.0 min/day (SE = 12.6) of SB. During COVID-19 pandemic there was a decrease in steps/day (β = −886 steps/day, SE = 361, p = 0.018), in moderate-vigorous PA (β = −2.8 min/day, SE = 2.4, p = 0.018), and a trend in light PA (β = −26.6 min/day, SE = 13.4, p = 0.053). In addition, SB increased during the COVID-19 pandemic (β = 29.6 min/day, SE = 13.4, p = 0.032). The magnitude of changes was greater on the weekend, mainly for steps/day (β = −1739 steps/day, SE = 424, p < 0.001) and the SB pattern (more time spent in bouts of ≥10 and 30 min, less breaks/day and breaks/h). Conclusions The COVID-19 pandemic may elicit unhealthy changes in movement behavior in hypertensive older adults. Lower PA, higher and more prolonged SB on the weekend are the main features of the behavioral changes. Unhealthy changes in movement behavior were observed during the COVID-19 pandemic. Hypertensive older adults decreased steps/day and time spent in physical activities. An increase in time spent in sedentary behavior (SB) was observed. The time spent in prolonged SB increased and the breaks in SB decreased. Greater unhealthy changes in movement behavior occurred on weekend.
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Affiliation(s)
- Rodrigo A V Browne
- Graduate Program in Health Sciences, Federal University of Rio Grande do Norte, Natal, RN, Brazil
| | - Geovani A D Macêdo
- Graduate Program in Physical Education, Federal University of Rio Grande do Norte, Natal, RN, Brazil
| | - Ludmila L P Cabral
- Graduate Program in Health Sciences, Federal University of Rio Grande do Norte, Natal, RN, Brazil
| | - Gledson T A Oliveira
- Graduate Program in Health Sciences, Federal University of Rio Grande do Norte, Natal, RN, Brazil
| | - Andrés Vivas
- Graduate Program in Health Sciences, Federal University of Rio Grande do Norte, Natal, RN, Brazil
| | - Eduardo B Fontes
- Graduate Program in Health Sciences, Federal University of Rio Grande do Norte, Natal, RN, Brazil; Graduate Program in Physical Education, Federal University of Rio Grande do Norte, Natal, RN, Brazil
| | - Hassan M Elsangedy
- Graduate Program in Physical Education, Federal University of Rio Grande do Norte, Natal, RN, Brazil
| | - Eduardo C Costa
- Graduate Program in Health Sciences, Federal University of Rio Grande do Norte, Natal, RN, Brazil; Graduate Program in Physical Education, Federal University of Rio Grande do Norte, Natal, RN, Brazil.
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44
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Augenreich M, Stickford J, Stute N, Koontz L, Cope J, Bennett C, Ratchford SM. Vascular dysfunction and oxidative stress caused by acute formaldehyde exposure in female adults. Am J Physiol Heart Circ Physiol 2020; 319:H1369-H1379. [PMID: 33064555 DOI: 10.1152/ajpheart.00605.2020] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Formaldehyde (FA) is a common, volatile organic compound used in organic preservation with known health effects of eye, nose, and throat irritation linked to oxidative stress and inflammation. Indeed, long-term FA exposure may provoke skin disorders, cancer, and cardiovascular disease. However, the effects of short-term FA exposure on the vasculature have yet to be investigated. We sought to investigate the impact of an acute FA exposure on 1) macrovascular function in the arm (brachial artery flow-mediated dilation, FMD), 2) microvascular function in the arm (brachial artery reactive hyperemia, RH) and leg (common femoral artery, supine passive limb movement, PLM), and 3) circulating markers of oxidative stress (xanthine oxidase, XO; protein carbonyl, PC; and malondialdehyde, MDA) and inflammation (C-reactive protein, CRP). Ten (n = 10) healthy females (23 ± 1 yr) were studied before and immediately after a 90-min FA exposure [(FA): 197 ± 79 ppb] in cadaver dissection laboratories. Brachial artery FMD% decreased following FA exposure (Pre-FA Exp: 9.41 ± 4.21%, Post-FA Exp: 6.74 ± 2.57%; P = 0.043), and FMD/shear decreased following FA exposure (Pre-FA Exp: 0.13 ± 0.07 AU, Post-FA Exp: 0.07 ± 0.03 AU; P = 0.016). The area under the curve for brachial artery RH (Pre-FA Exp: 481 ± 191 ml, Post-FA Exp: 499 ± 165 ml) and common femoral artery PLM (Pre-FA Exp: 139 ± 95 ml, Post-FA Exp: 129 ± 64 ml) were unchanged by FA exposure (P > 0.05). Circulating MDA increased (Pre-FA Exp: 4.8 ± 1.3 µM, Post-FA Exp: 6.3 ± 2.2 µM; P = 0.047) while XO, PC, and CRP were unchanged by FA exposure (P > 0.05). These initial data suggest a short FA exposure can adversely alter vascular function and oxidative stress, influencing cardiovascular health.NEW & NOTEWORTHY This study was the first to investigate the implications of acute formaldehyde (FA) exposure on adult female vascular function in the arms and legs. The main findings of this study were a decrease in conduit vessel function without any alteration to microvascular function following a 90-min FA exposure. Additionally, the oxidative stress marker malondialdehyde increased after FA exposure. Taken together, these results suggest acute FA exposure have deleterious implications for the vasculature and redox balance.Listen to this article's corresponding podcast at https://ajpheart.podbean.com/e/formaldehyde-exposure-decreases-vascular-function/.
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Affiliation(s)
- Marc Augenreich
- Department of Health & Exercise Science, Appalachian State University, Boone, North Carolina
| | - Jonathon Stickford
- Department of Health & Exercise Science, Appalachian State University, Boone, North Carolina
| | - Nina Stute
- Department of Health & Exercise Science, Appalachian State University, Boone, North Carolina
| | - Laurel Koontz
- Department of Health & Exercise Science, Appalachian State University, Boone, North Carolina
| | - Janet Cope
- Department of Physical Therapy Education, Elon University School of Health Sciences, Elon, North Carolina
| | - Cynthia Bennett
- Department of Physician Assistant Studies, Elon University School of Health Sciences, Elon, North Carolina
| | - Stephen M Ratchford
- Department of Health & Exercise Science, Appalachian State University, Boone, North Carolina
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45
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O’Brien MW, Johns JA, Al-Hinnawi A, Kimmerly DS. Popliteal flow-mediated dilatory responses to an acute bout of prolonged sitting between earlier and later phases of natural menstrual and oral contraceptive pill cycles. J Appl Physiol (1985) 2020; 129:637-645. [DOI: 10.1152/japplphysiol.00424.2020] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
We compared changes in popliteal artery endothelial function to a 3-h bout of sitting in females across their natural menstrual or oral contraceptive pill cycles. Pre-sitting endothelial-dependent vasodilation was greater in females who naturally menstruate during the later versus earlier phase but unchanged among contraceptive pill phases. Neither menstrual nor oral contraceptive pill phases attenuated the robust decline in conduit artery health following an acute period of uninterrupted sitting in young females.
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Affiliation(s)
- Myles W. O’Brien
- Division of Kinesiology, School of Health and Human Performance, Faculty of Health, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Jarrett A. Johns
- Division of Kinesiology, School of Health and Human Performance, Faculty of Health, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Amera Al-Hinnawi
- Division of Kinesiology, School of Health and Human Performance, Faculty of Health, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Derek S. Kimmerly
- Division of Kinesiology, School of Health and Human Performance, Faculty of Health, Dalhousie University, Halifax, Nova Scotia, Canada
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46
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Sapp RM, Landers-Ramos RQ, Shill DD, Springer CB, Hagberg JM. Sex-specific alterations in blood-borne factors in physically inactive individuals are detrimental to endothelial cell functions. J Appl Physiol (1985) 2020; 129:664-674. [PMID: 32730175 DOI: 10.1152/japplphysiol.00292.2020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Mechanisms underlying the protective effects of both habitual endurance exercise and the female sex on vascular function are incompletely understood. Blood-borne circulating factors, such as circulating microRNAs (ci-miRs), may partially explain these effects. Blood samples were obtained from young, healthy men and women who either habitually performed endurance exercise (endurance trained) or were relatively inactive (sedentary). Women were tested during the early follicular phase of the menstrual cycle or the placebo pill phase of oral contraceptive to control for estrogen. Cultured human umbilical vein endothelial cells (HUVECs) were exposed to participants' serum in migration, proliferation, and reactive oxygen species (ROS) assays. Real-time quantitative polymerase chain reaction was used to quantify an initial array of 84 cardiovascular disease (CVD)-related ci-miRs, followed by validation of 10 ci-miRs. All participants were devoid of traditional CVD risk factors, and circulating estradiol concentration was not different between groups. Serum of endurance-trained women induced greater HUVEC migration compared with serum of sedentary women. HUVEC ROS production was greater in response to serum of sedentary men compared with serum of endurance-trained men and sedentary women. There were sex effects on the levels of nine ci-miRs, with greater levels in men, while ci-miRs-140-5p and 145-5p were also higher in sedentary compared with endurance-trained men and/or women. In a sex-specific manner, habitual endurance exercise was associated with beneficial effects of serum on HUVECs. Thus, alterations in circulating factors may contribute to the protective effects of habitual endurance exercise on vascular health. Additionally, sex had a greater impact than habitual activity level on the levels of vascular-related ci-miRs.NEW & NOTEWORTHY Serum from sedentary women caused impaired endothelial migration, whereas serum from sedentary men elicited increased endothelial reactive oxygen species production as compared with serum from their endurance-trained counterparts. Select CVD-related circulating microRNAs (ci-miRs) were higher in men than women, while ci-miRs-140-5p and 145-5p were also higher in sedentary versus trained men and/or women. Our data suggest that alterations in circulating factors may contribute to the protective effects of habitual exercise and sex on vascular health.
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Affiliation(s)
- Ryan M Sapp
- Department of Kinesiology, School of Public Health, University of Maryland, College Park, Maryland
| | | | - Daniel D Shill
- Department of Kinesiology, School of Public Health, University of Maryland, College Park, Maryland
| | - Catherine B Springer
- Department of Kinesiology, School of Public Health, University of Maryland, College Park, Maryland
| | - James M Hagberg
- Department of Kinesiology, School of Public Health, University of Maryland, College Park, Maryland
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47
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Johns JA, O'Brien MW, Bungay A, Kimmerly DS. Sex and light physical activity impact popliteal, but not brachial artery flow-mediated dilation in physically active young adults. Appl Physiol Nutr Metab 2020; 45:1387-1395. [PMID: 32687716 DOI: 10.1139/apnm-2020-0308] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
When controlling for baseline diameter, males have greater brachial flow-mediated dilation (BA-FMD) responses than females. It is unclear whether sex differences in baseline diameter also influences popliteal FMD (POP-FMD), which may be impacted by cardiorespiratory fitness and physical activity levels. We hypothesized that males would exhibit greater BA-FMD and POP-FMD when allometrically scaled to baseline diameter. FMD (ultrasonography), cardiorespiratory fitness (indirect calorimetry), and objectively measured physical activity were assessed in males (n = 13; age, 23 ± 3 years; peak oxygen consumption, 48.0 ± 7.1 mL·kg-1·min-1) and females (n = 13; age, 24 ± 2 years; peak oxygen consumption, 36.8 ± 6.0 mL·kg-1·min-1). Both groups had similarly high levels of moderate-to-vigorous intensity physical activity (503 ± 174 vs. 430 ± 142 min·week-1, p = 0.25). However, males were more aerobically fit (p < 0.001) and females accumulated more light-intensity physical activity (182 ± 67 vs. 127 ± 53 min·week-1, p = 0.03). Relative and allometrically scaled BA-FMD were similar (both, p ≥ 0.09) between sexes. In contrast, relative (6.2% ± 1.0% vs. 4.6% ± 1.4%, p = 0.001) and scaled (6.8% ± 1.7% vs. 4.7% ± 1.7%, p = 0.03) POP-FMD were greater in females. Relative POP-FMD was related to light-intensity physical activity in the pooled sample (r = 0.43; p = 0.04). However, the enhanced relative POP-FMD in females remained after adjusting for higher light-intensity physical activity levels (p = 0.01). Young females have enhanced popliteal, but not brachial, endothelial health than males with similar moderate-to-vigorous intensity physical activity levels and higher cardiorespiratory fitness. Novelty In physically active adults, females had greater POP-FMD but not BA-FMD than males. The enhanced POP-FMD in females was not related to greater vascular smooth muscle sensitivity to nitric oxide or their smaller baseline diameters. POP-FMD was associated with light physical activity levels in the pooled sample.
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Affiliation(s)
- Jarrett A Johns
- Division of Kinesiology, School of Health and Human Performance, Faculty of Health, Dalhousie University, Halifax, NS B3H 4R2, Canada.,Division of Kinesiology, School of Health and Human Performance, Faculty of Health, Dalhousie University, Halifax, NS B3H 4R2, Canada
| | - Myles W O'Brien
- Division of Kinesiology, School of Health and Human Performance, Faculty of Health, Dalhousie University, Halifax, NS B3H 4R2, Canada.,Division of Kinesiology, School of Health and Human Performance, Faculty of Health, Dalhousie University, Halifax, NS B3H 4R2, Canada
| | - Amanda Bungay
- Division of Kinesiology, School of Health and Human Performance, Faculty of Health, Dalhousie University, Halifax, NS B3H 4R2, Canada.,Division of Kinesiology, School of Health and Human Performance, Faculty of Health, Dalhousie University, Halifax, NS B3H 4R2, Canada
| | - Derek S Kimmerly
- Division of Kinesiology, School of Health and Human Performance, Faculty of Health, Dalhousie University, Halifax, NS B3H 4R2, Canada.,Division of Kinesiology, School of Health and Human Performance, Faculty of Health, Dalhousie University, Halifax, NS B3H 4R2, Canada
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48
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Evans WS, Hanson ED, Shill DD, Landers‐Ramos RQ, Stoner L, Willey Q, Credeur DP, Prior SJ. Sitting decreases endothelial microparticles but not circulating angiogenic cells irrespective of lower leg exercises: a randomized cross‐over trial. Exp Physiol 2020; 105:1408-1419. [DOI: 10.1113/ep088690] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Accepted: 06/23/2020] [Indexed: 01/07/2023]
Affiliation(s)
- William S. Evans
- Department of Exercise and Sport Science University of North Carolina Chapel Hill NC 27599 USA
- Department of Kinesiology University of Maryland College Park MD 20740 USA
| | - Erik D. Hanson
- Department of Exercise and Sport Science University of North Carolina Chapel Hill NC 27599 USA
| | - Daniel D. Shill
- Department of Kinesiology University of Maryland College Park MD 20740 USA
| | - Rian Q. Landers‐Ramos
- Department of Kinesiology Towson University Towson MD 21252
- Baltimore Veterans Affairs Geriatric Research Education and Clinical Center Baltimore MD 21201 USA
| | - Lee Stoner
- Department of Exercise and Sport Science University of North Carolina Chapel Hill NC 27599 USA
| | - Quentin Willey
- Department of Exercise and Sport Science University of North Carolina Chapel Hill NC 27599 USA
| | - Daniel P. Credeur
- School of Kinesiology and Nutrition University of Southern Mississippi Hattiesburg MS 39406 USA
| | - Steven J. Prior
- Department of Kinesiology University of Maryland College Park MD 20740 USA
- Baltimore Veterans Affairs Geriatric Research Education and Clinical Center Baltimore MD 21201 USA
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49
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Headid RJ, Pekas EJ, Wooden TK, Son WM, Layec G, Shin J, Park SY. Impacts of prolonged sitting with mild hypercapnia on vascular and autonomic function in healthy recreationally active adults. Am J Physiol Heart Circ Physiol 2020; 319:H468-H480. [PMID: 32648821 DOI: 10.1152/ajpheart.00354.2020] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Prolonged sitting, which is known to impair peripheral vascular function, often occurs in spaces (e.g., offices) with mild hypercapnic atmospheres. However, the effects of prolonged sitting in hypercapnic conditions on vascular function are unknown. Therefore, the purpose of this study was to investigate the effects of prolonged sitting in mild hypercapnic conditions on vascular and autonomic function in humans. Twelve healthy young adults participated in two experimental visits that consisted of sitting for 2.5 h in a control condition [normal atmospheric conditions sitting (PSIT)] or a mild hypercapnic condition (HCAP; CO2 = 1,500 ppm). During each visit, heart rate variability (HRV), blood pressure (BP), pulse wave velocity (PWV), augmentation index (AIx), brachial and popliteal artery flow-mediated dilation (FMD), and near-infrared spectroscopy (NIRS) were assessed before and after prolonged sitting. Sitting significantly decreased AIx in both groups (P < 0.05). Brachial and popliteal FMD were reduced with sitting (P < 0.05), and the reduction in popliteal FMD was amplified by HCAP (P < 0.05). Baseline microvascular oxygenation was decreased following sitting in both groups (P < 0.05). However, microvascular reoxygenation upon cuff release was slower only in HCAP (P < 0.05). HRV, HR, BP, and PWV did not significantly change with sitting in either group (P > 0.05). We conclude that prolonged sitting attenuated both brachial and popliteal endothelial function and was associated with perturbed microcirculation. Additionally, mild hypercapnic conditions further impaired peripheral endothelial and microvascular function. Together, these findings suggest that prolonged sitting is accompanied by a host of deleterious effects on the vasculature, which are exacerbated by mild hypercapnia.NEW & NOTEWORTHY The results of this study reveal that prolonged sitting attenuates endothelial function and microvascular function. Additionally, prolonged sitting with mild hypercapnia, which is similar to everyday environments, further exacerbates peripheral endothelial function and microvascular function.
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Affiliation(s)
- Ronald J Headid
- School of Health and Kinesiology, University of Nebraska at Omaha, Omaha, Nebraska
| | - Elizabeth J Pekas
- School of Health and Kinesiology, University of Nebraska at Omaha, Omaha, Nebraska
| | - TeSean K Wooden
- School of Health and Kinesiology, University of Nebraska at Omaha, Omaha, Nebraska
| | - Won-Mok Son
- School of Health and Kinesiology, University of Nebraska at Omaha, Omaha, Nebraska
| | - Gwenael Layec
- Department of Kinesiology, University of Massachusetts, Amherst, Massachusetts.,Institute for Applied Life Sciences, University of Massachusetts, Amherst, Massachusetts
| | - John Shin
- Wiess School of Natural Sciences, Rice University, Houston, Texas
| | - Song-Young Park
- School of Health and Kinesiology, University of Nebraska at Omaha, Omaha, Nebraska
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50
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The Length and Number of Sedentary Bouts Predict Fibrinogen Levels in Postmenopausal Women. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17093051. [PMID: 32353951 PMCID: PMC7246768 DOI: 10.3390/ijerph17093051] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 04/21/2020] [Accepted: 04/26/2020] [Indexed: 11/17/2022]
Abstract
Menopause is associated with adverse changes in coagulation homeostasis. We aimed to investigate the association between objectively measured sedentary behavior (SB) and SB bouts (i.e., number and length of SB bouts) vs. fibrinogen levels in post-menopausal women. Fifty-three post-menopausal women (age 59.8 ± 6.2 years, BMI 27.3 ± 4.4) wore a multisensory device (Sensewear Mini Armband, BodyMedia, Inc., Pittsburgh, PA) for 5 days, to measure SB and physical activity (PA). Blood samples were collected to measure serum fibrinogen. Fibrinogen was directly correlated with SB (r = −0.48, p < 0.01), lying down during awake time (r = −0.50, p < 0.01), and both medium (11–30 mins) and very long bouts (>1 h) of SB (r = −0.59, p < 0.01; r = −0.51, p < 0.01, respectively), and inversely correlated with moderate to vigorous-intensity physical activity (r = −0.39, p < 0.01). Furthermore, fibrinogen was also directly correlated with BMI (r = −0.28, p < 0.05). In postmenopausal women without prevalent cardiovascular disease, the number of prolonged and uninterrupted sedentary bouts is directly correlated with increased fibrinogen levels, regardless of PA and BMI. This result suggests the importance of delivering new strategies to counteract the increase of sedentariness and inactivity of the postmenopausal population.
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