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Tucker WJ, Sawyer BJ, Bhammar DM, Ware EW, Angadi SS, Gaesser GA. Treadmill walking economy is not affected by body fat and body mass index in adults. Physiol Rep 2024; 12:e16023. [PMID: 38760177 PMCID: PMC11101323 DOI: 10.14814/phy2.16023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 03/20/2024] [Accepted: 04/05/2024] [Indexed: 05/19/2024] Open
Abstract
To determine whether body fat and body mass index (BMI) affect the energy cost of walking (Cw; J/kg/m), ventilation, and gas exchange data from 205 adults (115 females; percent body fat range = 3.0%-52.8%; BMI range = 17.5-43.2 kg/m2) were obtained at rest and during treadmill walking at 1.34 m/s to calculate gross and net Cw. Linear regression was used to assess relationships between body composition indices, Cw, and standing metabolic rate (SMR). Unpaired t-tests were used to assess differences between sex, and one-way ANOVA was used to assess differences by BMI categories: normal weight, <25.0 kg/m2; overweight, 25.0-29.9 km/m2; and obese, ≥30 kg/m2. Net Cw was not related to body fat percent, fat mass, or BMI (all R2 ≤ 0.011). Furthermore, mean net Cw was similar by sex (male: 2.19 ± 0.30 J/kg/m; female: 2.24 ± 0.37 J/kg/m, p = 0.35) and across BMI categories (normal weight: 2.23 ± 0.36 J/kg/m; overweight: 2.18 ± 0.33 J/kg/m; obese: 2.26 ± 0.31, p = 0.54). Gross Cw and SMR were inversely associated with percent body fat, fat mass, and BMI (all R2 between 0.033 and 0.270; all p ≤ 0.008). In conclusion, Net Cw is not influenced by body fat percentage, total body fat, and BMI and does not differ by sex.
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Affiliation(s)
- Wesley J. Tucker
- Department of Nutrition & Food SciencesTexas Woman's UniversityHoustonTexasUSA
- Institute for Women's Health, College of Health SciencesHoustonTexasUSA
| | - Brandon J. Sawyer
- Department of Kinesiology & Department of BiologyPoint Loma Nazarene UniversitySan DiegoCaliforniaUSA
| | - Dharini M. Bhammar
- Center for Tobacco Research, Division of Medical Oncology, Department of Internal MedicineThe Ohio State UniversityColumbusOhioUSA
| | - Emma W. Ware
- Department of Nutrition & Food SciencesTexas Woman's UniversityHoustonTexasUSA
| | - Siddhartha S. Angadi
- Department of Kinesiology, School of Education and Human DevelopmentUniversity of VirginiaCharlottesvilleVirginiaUSA
| | - Glenn A. Gaesser
- College of Health SolutionsArizona State UniversityPhoenixArizonaUSA
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Poole DC, Gaesser GA. Exercise intolerance with ageing: Major role for vascular dysfunction? Exp Physiol 2024; 109:163-164. [PMID: 38054658 PMCID: PMC10988700 DOI: 10.1113/ep091606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Accepted: 11/23/2023] [Indexed: 12/07/2023]
Affiliation(s)
- David C. Poole
- Department of KinesiologyKansas State UniversityManhattanKansasUSA
| | - Glenn A. Gaesser
- College of Health SolutionsArizona State UniversityPhoenixArizonaUSA
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Gaesser GA. Refined grain intake and cardiovascular disease: Meta-analyses of prospective cohort studies. Trends Cardiovasc Med 2024; 34:59-68. [PMID: 36075506 DOI: 10.1016/j.tcm.2022.08.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 08/08/2022] [Accepted: 08/31/2022] [Indexed: 10/14/2022]
Abstract
Refined grains are included as part of an unhealthy, or Western, dietary pattern, which has been shown to be associated with increased risk of cardiovascular disease (CVD). To clarify the association between refined grain intake and CVD risk, Pubmed and Scopus databases were searched for relevant cohort studies from database inception to June 30, 2022. Only studies that examined refined grains as a distinct consumption category and not as part of a dietary pattern, were included. Meta-analyses were performed using Cochrane's RevMan 5.4.1 software, applying inverse variance risk ratios in random effects models for each outcome of interest. Heterogeneity was assessed with Cochrane's Q (chi2) and I2 statistics. Meta-analyses of hazard ratios (HR) and 95% confidence intervals (CI) obtained from 17 prospective cohort studies (>875,000 participants) indicated that refined grain intake was not associated with risk of CVD (HR = 1.08, 95% CI, 0.99-1.18, I2 = 70%; 9 cohorts), stroke (HR = 1.06, 95% CI 0.92-1.23, I2 = 70%; 9 cohorts), or heart failure (HR = 0.95, 95% CI 0.77-1.16, I2 = 10%; 5 cohorts). White rice intake was also not associated with risk of CVD (HR = 0.93, 95% CI 0.86-1.00, I2 = 25%; 7 cohorts) or stroke (HR = 1.03, 95% CI 0.93-1.14, I2 = 22%; 7 cohorts). No significant publication bias was evident (Egger's test P values all > 0.05). The lack of association between refined grain intake and CVD risk was observed in meta-analyses of studies that restricted analyses to only staple grain foods (e.g., bread, cereal, pasta, white rice), as well as for meta-analyses of studies that included both staple and indulgent grain foods (e.g., cakes, cookies, doughnuts, brownies, muffins, pastries). Probable confounding from unmeasured variables in studies included in the meta-analyses diminishes the overall quality of evidence. Although refined grains are included as a component of the Western dietary pattern, the results of the meta-analyses suggest that refined grains do not contribute to the higher CVD risk associated with this unhealthy dietary pattern. This information should be considered in formulation of future dietary recommendations.
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Affiliation(s)
- Glenn A Gaesser
- College of Health Solutions, Arizona State University, Phoenix, AZ 85004, United States.
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Joseph RP, Ainsworth BE, Vega-López S, Adams MA, Todd M, Gaesser GA, Keller C. Cardiometabolic Risk Factors Among Insufficiently Active African American Women With Obesity: Baseline Findings From Smart Walk. J Cardiovasc Nurs 2023; 38:198-204. [PMID: 35794781 PMCID: PMC9813275 DOI: 10.1097/jcn.0000000000000930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
BACKGROUND Low moderate-to-vigorous physical activity (MVPA) levels and obesity are associated with increased cardiometabolic disease risk. OBJECTIVE The aim of this study was to describe MVPA and cardiometabolic risk characteristics of insufficiently active African American women with obesity (N = 60) enrolled in a culturally tailored MVPA intervention. METHODS We assessed accelerometer-measured and self-reported MVPA, blood pressure, serum lipid profiles, cardiorespiratory fitness (VO 2 peak), and aortic pulse wave velocity. RESULTS Participants (mean age, 38.4; mean body mass index, 40.6 kg/m 2 ) averaged 15 min/d of accelerometer-measured MVPA and 30 min/wk of self-reported MVPA. Systolic and diastolic blood pressure levels were elevated (135.4 and 84.0 mm Hg, respectively). With the exception of low-density lipoprotein cholesterol (121.4 mg/dL) and high-density lipoprotein cholesterol (47.6 mg/dL), lipid profiles were within reference ranges. Compared with normative reference values, average VO 2 peak was low (18.7 mL/kg/min), and pulse wave velocity was high (7.4 m/s). CONCLUSIONS Our sample of insufficiently active African American women with obesity was at an elevated risk for cardiometabolic disease.
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Affiliation(s)
- Rodney P. Joseph
- Center for Health Promotion and Disease Prevention, Edson College of Nursing and Health Innovation, Arizona State University, Phoenix, AZ, USA
| | - Barbara E. Ainsworth
- College of Health Solutions, Arizona State University, Phoenix, AZ, USA
- Department of Kinesiology, Shanghai University of Sport, Shanghai, China
| | - Sonia Vega-López
- College of Health Solutions, Arizona State University, Phoenix, AZ, USA
- Southwest Interdisciplinary Research Center, Arizona State University, Phoenix, AZ, USA
| | - Marc A. Adams
- College of Health Solutions, Arizona State University, Phoenix, AZ, USA
| | - Michael Todd
- Edson College of Nursing and Health Innovation, Arizona State University, Phoenix, AZ, USA
| | - Glenn A. Gaesser
- College of Health Solutions, Arizona State University, Phoenix, AZ, USA
| | - Colleen Keller
- Center for Health Promotion and Disease Prevention, Edson College of Nursing and Health Innovation, Arizona State University, Phoenix, AZ, USA
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Toledo MJL, Ainsworth BE, Gaesser GA, Hooker SP, Pereira MA, Buman MP. Does frequency or duration of standing breaks drive changes in glycemic response? A randomized crossover trial. Scand J Med Sci Sports 2023. [PMID: 36840389 DOI: 10.1111/sms.14344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2022] [Revised: 01/20/2023] [Accepted: 02/16/2023] [Indexed: 02/26/2023]
Abstract
Intervention strategies to break up sitting have mostly focused on the modality (i.e., comparing different intensities and/or type of activities) and less on how frequency and duration of breaks affect health outcomes. This study compared the efficacy of different strategies to break up sitting time [i.e., high frequency, low duration standing breaks (HFLD) and low frequency, high duration standing breaks (LFHD)] in reducing postprandial glucose. Eleven sedentary and prediabetic adults (mean ± SD age = 46.8 ± 10.6 years; 73% female) participated in a cross-over trial. There were six blocks that represented all potential combinations (ordering) of the study conditions and participants were randomly assigned to a block. Each participant underwent three 7.5-h laboratory visits (1 week apart) where they engaged in either continuous sitting, HFLD, or LFHD condition while performing their usual office-related tasks. Standardized breakfast and lunch meals were provided. Postprandial mean glucose, area under the curve (AUC), and incremental area under the curve (iAUC) were evaluated using mixed models. Compared with LFHD condition, the HFLD standing breaks condition significantly lowered mean glucose by -9.94 (-14.13, -5.74) mg/dL·h after lunch, and by -6.23 (-9.93, -2.52) mg/dL·h, for the total lab visit time. Overall, the results favor frequently interrupting sitting with standing breaks to improve glycemic control in individuals with prediabetes. Further studies are needed with larger sample sizes to confirm the results.
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Affiliation(s)
- Meynard John L Toledo
- Center for Self-Report Sciences, University of Southern California, Los Angeles, California, USA
| | - Barbara E Ainsworth
- College of Health Solutions, Arizona State University, Phoenix, Arizona, USA.,School of Kinesiology, Shanghai University of Sport, Shanghai, China
| | - Glenn A Gaesser
- College of Health Solutions, Arizona State University, Phoenix, Arizona, USA
| | - Steven P Hooker
- College of Health and Human Services, San Diego State University, San Diego, California, USA
| | - Mark A Pereira
- Division of Epidemiology and Community Health, University of Minnesota, Minneapolis, Minnesota, USA
| | - Matthew P Buman
- College of Health Solutions, Arizona State University, Phoenix, Arizona, USA
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Joseph RP, Todd M, Ainsworth BE, Vega-López S, Adams MA, Hollingshead K, Hooker SP, Gaesser GA, Keller C. Smart Walk: A Culturally Tailored Smartphone-Delivered Physical Activity Intervention for Cardiometabolic Risk Reduction among African American Women. Int J Environ Res Public Health 2023; 20:1000. [PMID: 36673756 PMCID: PMC9859082 DOI: 10.3390/ijerph20021000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 12/28/2022] [Accepted: 12/31/2022] [Indexed: 06/17/2023]
Abstract
This article reports the results of Smart Walk: a randomized pilot trial of an 8-month culturally tailored, smartphone-delivered physical activity (PA) intervention for African American women with obesity. Sixty participants (age range = 24−49 years; BMI range = 30−58 kg/m2) were randomized to the Smart Walk intervention (n = 30) or a wellness comparison intervention (n = 30). Results supported the acceptability and feasibility of the intervention, as demonstrated by participant retention (85% at 4 months and 78% at 8 months), Smart Walk app use, and intervention satisfaction (i.e., 100% of PA participants completing the intervention [n = 24] reported they would recommend it to friend). Smart Walk participants also reported greater increases in moderate-to-vigorous PA (4-month between-arm difference in change [b] = 43.3 min/week; p = 0.018; Cohen’s d = 0.69; 8-month b = 56.6 min/week; p = 0.046; d = 0.63) and demonstrated clinically relevant, although not statistically significant (p-values > 0.05), baseline to 4 months improvements in cardiorespiratory fitness (b = 1.67 mL/kg/min; d = 0.40), systolic blood pressure (b = −3.33 mmHg; d = 0.22), diastolic blood pressure (b = −4.28 mmHg; d = 0.37), and pulse wave velocity (b = −0.46 m/s; d = 0.33). Eight-month cardiometabolic outcomes followed similar trends, but had high rates of missing data (45−53%) due to COVID-19 restrictions. Collectively, findings demonstrated favorable outcomes for acceptability and feasibility, while also highlighting key areas for refinement in future research.
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Affiliation(s)
- Rodney P. Joseph
- Center for Health Promotion and Disease Prevention, Edson College of Nursing and Health Innovation, Arizona State University, 500 N 3rd St., Phoenix, AZ 85004, USA
| | - Michael Todd
- College of Nursing and Health Innovation, Arizona State University, 500 N 3rd St., Phoenix, AZ 85004, USA
| | | | - Sonia Vega-López
- College of Health Solutions, Arizona State University, Phoenix, AZ 85004, USA
- Southwest Interdisciplinary Research Center, Arizona State University, Phoenix, AZ 85004, USA
| | - Marc A. Adams
- College of Health Solutions, Arizona State University, Phoenix, AZ 85004, USA
| | - Kevin Hollingshead
- College of Health Solutions, Arizona State University, Phoenix, AZ 85004, USA
| | - Steven P. Hooker
- College of Health and Human Services, San Diego State University, San Diego, CA 92182, USA
| | - Glenn A. Gaesser
- College of Health Solutions, Arizona State University, Phoenix, AZ 85004, USA
| | - Colleen Keller
- Center for Health Promotion and Disease Prevention, Edson College of Nursing and Health Innovation, Arizona State University, 500 N 3rd St., Phoenix, AZ 85004, USA
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Abstract
OBJECTIVE To compare the rate of energy expenditure of low efficiency walking with high efficiency walking. DESIGN Laboratory based experimental study. SETTING United States. PARTICIPANTS 13 healthy adults (six women, seven men) with no known gait disorder, mean (±standard deviation) age 34.2±16.1 years, height 174.2±12.6 cm, weight 78.2±22.5 kg, and body mass index 25.6±6.0. INTERVENTION Participants performed three, five minute walking trials around an indoor 30 m course. The first trial consisted of walking at a freely chosen walking speed in the participant's usual style. The next two trials consisted of low efficiency walks in which participants were asked to duplicate the walks of Mr Teabag and Mr Putey (acted by John Cleese and Michael Palin, respectively) in the legendary Monty Python Ministry of Silly Walks (MoSW) skit that first aired in 1970. Distance covered during the five minute walks was used to calculate average speed. Ventilation and gas exchange were collected throughout to determine oxygen uptake (V̇O2; mL O2/kg/min) and energy expenditure (EE; kcal/kg/min; 1 kcal=4.18 kJ), reported as mean±standard deviation. MAIN OUTCOME MEASURES V̇O2 and EE. RESULTS V̇O2 and EE were about 2.5 times higher (P<0.001) during the Teabag walk compared with participants' usual walk (27.9±4.8 v 11.3±1.9 mL O2/kg/min; 0.14±0.03 v 0.06±0.01 kcal/kg/min), but were not different during the Putey walk (12.3±1.8 mL/kg/min; 0.06±0.01 kcal/kg/min). Each minute of Teabag walking increased EE over participants' usual walking by an average of 8.0 kcal (range 5.5-12.0) in men and by 5.2 kcal (range 3.9-6.2) in women, and qualified as vigorous intensity physical activity (>6 resting metabolic equivalents). CONCLUSIONS For adults with no known gait disorder who average approximately 5000 steps/day, exchanging about 22%-34% of their daily steps with higher energy, low efficiency walking in Teabag style-requiring around 12-19 min-could increase daily EE by 100 kcal. Adults could achieve 75 minutes of vigorous intensity physical activity per week by walking inefficiently for about 11 min/day. Had an initiative to promote inefficient movement been adopted in the early 1970s, we might now be living among a healthier society. Efforts to promote higher energy-and perhaps more joyful-walking should ensure inclusivity and inefficiency for all.
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Affiliation(s)
- Glenn A Gaesser
- College of Health Solutions, Arizona State University, Phoenix, AZ, USA
| | - David C Poole
- Departments of Kinesiology and Anatomy and Physiology, Kansas State University, Manhattan, KS, USA
| | - Siddhartha S Angadi
- Department of Kinesiology, School of Education and Human Development, University of Virginia, Charlottesville, VA, USA
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Gaesser GA, Poole DC, Angadi SS. Measuring human energy expenditure: public health application to counter inactivity. BMJ 2022; 379:o2937. [PMID: 36543339 DOI: 10.1136/bmj.o2937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Glenn A Gaesser
- College of Health Solutions, Arizona State University, Phoenix, AZ, USA
| | - David C Poole
- Departments of Kinesiology and Anatomy and Physiology, Kansas State University, Manhattan, KS, USA
| | - Siddhartha S Angadi
- Department of Kinesiology, School of Education and Human Development, University of Virginia, Charlottesville, VA, USA
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Gaesser GA. Type 2 Diabetes Incidence and Mortality: Associations with Physical Activity, Fitness, Weight Loss, and Weight Cycling. Rev Cardiovasc Med 2022. [DOI: 10.31083/j.rcm2311364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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Weeldreyer NR, Martin M, McEntee M, Marvasti FF, Kessler R, Gaesser GA, Angadi SS. Clinic Based, Patient Choice Driven Lifestyle Intervention Lowers HbA1c In Type 2 Diabetes. Med Sci Sports Exerc 2022. [DOI: 10.1249/01.mss.0000879556.38166.0c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Gaesser GA. Refined Grain Intake and Risk of Type 2 Diabetes. Mayo Clin Proc 2022; 97:1428-1436. [PMID: 35840359 DOI: 10.1016/j.mayocp.2022.05.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/18/2021] [Revised: 04/10/2022] [Accepted: 05/03/2022] [Indexed: 10/17/2022]
Affiliation(s)
- Glenn A Gaesser
- College of Health Solutions, Arizona State University, Phoenix, AZ.
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Jarrett CL, Tucker WJ, Angadi SS, Gaesser GA. Postexercise Hypotension Is Delayed in Men With Obesity and Hypertension. Front Physiol 2022; 13:819616. [PMID: 35350685 PMCID: PMC8958023 DOI: 10.3389/fphys.2022.819616] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2021] [Accepted: 02/10/2022] [Indexed: 11/13/2022] Open
Abstract
Background Postexercise hypotension (PEH) can play a major role in the daily blood pressure management among individuals with hypertension. However, there are limited data on PEH in persons with obesity and hypertension, and no PEH data in this population beyond 90 min postexercise. Purpose The purpose of this study was to determine if PEH could be elicited in men with obesity and hypertension during a 4-h postexercise measurement period. Methods Seven men [age = 28 ± 4 years; body mass index = 34.6 ± 4.8 kg/m2; brachial systolic blood pressure (SBP): 138 ± 4 mmHg; brachial diastolic BP (DBP): 80 ± 5 mmHg; central SBP: 125 ± 4 mmHg; central DBP: 81 ± 8 mmHg] performed two exercise sessions on a cycle ergometer, each on a separate day, for 45 min at ∼65% VO2max. One exercise session was performed at a cadence of 45 RPM and one at 90 RPM. Blood pressure was monitored with a SunTech Oscar2 ambulatory blood pressure monitor for 4 h after both exercise sessions, and during a time-matched control condition. Results Both brachial and central SBP were not changed during the first h postexercise but were reduced by ∼5-11 mmHg between 2 and 4 h postexercise (p < 0.05) after both exercise sessions. Brachial and central DBP were elevated by ∼5 mmHg at 1 h postexercise (p < 0.05) but were ∼2-3 mmHg lower compared to control at 4 h postexercise, and ∼2-4 mmHg lower at 3 h postexercise compared to baseline. Mean arterial pressure (MAP) was elevated compared to control at 1 h postexercise after both exercise sessions, but was ∼2-3 mmHg lower compared to control at 2, 3, and 4 h postexercise, and ∼4-7 mmHg lower at 3 h postexercise compared to baseline. Conclusion Despite the small sample size and preliminary nature of our results, we conclude that PEH is delayed in men with obesity and hypertension, but the magnitude and duration of PEH up to 4 h postexercise is similar to that reported in the literature for men without obesity and hypertension. The PEH is most pronounced for brachial and central SBP and MAP. The virtually identical pattern of PEH after both exercise trials indicates that the delayed PEH is a reproducible finding in men with obesity and hypertension.
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Affiliation(s)
- Catherine L Jarrett
- Geriatric Research, Education, and Clinical Center, Veterans Affairs Medical Center (VAMC), Salt Lake City, UT, United States.,Utah Vascular Research Laboratory, University of Utah School of Medicine, Salt Lake City, UT, United States
| | - Wesley J Tucker
- Department of Nutrition and Food Sciences, Texas Woman's University, Houston, TX, United States
| | - Siddhartha S Angadi
- Department of Kinesiology, School of Education and Human Development, University of Virginia, Charlottesville, VA, United States
| | - Glenn A Gaesser
- College of Health Solutions, Arizona State University, Phoenix, AZ, United States
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Tucker WJ, Jarrett CL, D’Lugos AC, Angadi SS, Gaesser GA. Effects of indulgent food snacking, with and without exercise training, on body weight, fat mass, and cardiometabolic risk markers in overweight and obese men. Physiol Rep 2021; 9:e15118. [PMID: 34816612 PMCID: PMC8611507 DOI: 10.14814/phy2.15118] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 10/24/2021] [Accepted: 10/31/2021] [Indexed: 11/24/2022] Open
Abstract
We hypothesized that exercise training would prevent gains in body weight and body fat, and worsening of cardiometabolic risk markers, during a 4-week period of indulgent food snacking in overweight/obese men. Twenty-eight physically inactive men (ages 19-47 yr) with body mass index (BMI) ≥25 kg/m2 consumed 48 donuts (2/day, 6 days/week; ~14,500 kcal total) for 4 weeks while maintaining habitual diet. Men were randomly assigned to control (n = 9), moderate-intensity continuous training (MICT; n = 9), or high-intensity interval training (HIIT; n = 10). Exercise training occurred 4 days/week, ~250 kcal/session. Controls did not increase body weight, body fat, or visceral abdominal fat. This was partially explained by a decrease in self-reported habitual energy (-239 kcal/day, p = 0.05) and carbohydrate (-47 g/day; p = 0.02) intake. Large inter-individual variability in changes in body weight, fat, and fat-free mass was evident in all groups. Fasting blood pressure, and blood concentrations of glucose, insulin, and lipids were unchanged in all groups. Glucose incremental area under the curve during an oral glucose tolerance test was reduced by 25.6% in control (p = 0.001) and 32.8% in MICT (p = 0.01) groups. Flow-mediated dilation (FMD) was not changed in any group. VO2max increased (p ≤ 0.001) in MICT (9.2%) and HIIT (12.1%) groups. We conclude that in physically inactive men with BMI ≥25 kg/m2 , consuming ~14,500 kcal as donuts over 4 weeks did not adversely affect body weight and body fat, or several markers of cardiometabolic risk. Consumption of the donuts may have prevented the expected improvement in FMD with HIIT.
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Affiliation(s)
- Wesley J. Tucker
- College of Health SolutionsArizona State UniversityPhoenixArizonaUSA
| | | | - Andrew C. D’Lugos
- College of Health SolutionsArizona State UniversityPhoenixArizonaUSA
| | | | - Glenn A. Gaesser
- College of Health SolutionsArizona State UniversityPhoenixArizonaUSA
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Abstract
We propose a weight-neutral strategy for obesity treatment on the following grounds: (1) the mortality risk associated with obesity is largely attenuated or eliminated by moderate-to-high levels of cardiorespiratory fitness (CRF) or physical activity (PA), (2) most cardiometabolic risk markers associated with obesity can be improved with exercise training independent of weight loss and by a magnitude similar to that observed with weight-loss programs, (3) weight loss, even if intentional, is not consistently associated with lower mortality risk, (4) increases in CRF or PA are consistently associated with greater reductions in mortality risk than is intentional weight loss, and (5) weight cycling is associated with numerous adverse health outcomes including increased mortality. Adherence to PA may improve if health care professionals consider PA and CRF as essential vital signs and consistently emphasize to their patients the myriad benefits of PA and CRF in the absence of weight loss.
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Affiliation(s)
- Glenn A. Gaesser
- College of Health Solutions, Arizona State University, Phoenix, AZ 85004, USA
| | - Siddhartha S. Angadi
- Department of Kinesiology, School of Education and Human Development, University of Virginia, Charlottesville, VA 22904, USA
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Villanueva IR, Campbell JC, Medina SM, Jorgensen TM, Wilson SL, Angadi SS, Gaesser GA, Dickinson JM. Comparison of constant load exercise intensity for verification of maximal oxygen uptake following a graded exercise test in older adults. Physiol Rep 2021; 9:e15037. [PMID: 34558207 PMCID: PMC8461211 DOI: 10.14814/phy2.15037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 08/20/2021] [Accepted: 08/26/2021] [Indexed: 11/24/2022] Open
Abstract
Maximal oxygen uptake (VO2 max) declines with advancing age and is a predictor of morbidity and mortality risk. The purpose here was to assess the utility of constant load tests performed either above or below peak work rate obtained from a graded exercise test for verification of VO2 max in older adults. Twenty-two healthy older adults (9M, 13F, 67 ± 6 years, BMI: 26.3 ± 5.1 kg·m-2 ) participated in the study. Participants were asked to complete two experimental trials in a randomized, counterbalanced cross-over design. Both trials (cycle ergometer) consisted of (1) an identical graded exercise test (ramp) and (2) a constant load test at either 85% (CL85; n = 22) or 110% (CL110; n = 20) of the peak work rate achieved during the associated ramp (performed 10-min post ramp). No significant differences were observed for peak VO2 (L·min-1 ) between CL85 (1.86 ± 0.72; p = 0.679) or CL110 (1.79 ± 0.73; p = 0.200) and the associated ramp (Ramp85, 1.85 ± 0.73; Ramp110, 1.85 ± 0.57). Using the study participant's mean coefficient of variation in peak VO2 between the two identical ramp tests (2.9%) to compare individual differences between constant load tests and the associated ramp revealed 19/22 (86%) of participants achieved a peak VO2 during CL85 that was similar or higher versus the ramp, while only 13/20 (65%) of participants achieved a peak VO2 during CL110 that was similar or higher versus the ramp. These data indicate that if a verification of VO2 max is warranted when testing older adults, a constant load effort at 85% of ramp peak power may be more likely to verify VO2 max as compared to an effort at 110% of ramp peak power.
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Affiliation(s)
| | | | | | | | | | | | | | - Jared M. Dickinson
- Department of Health SciencesCentral Washington UniversityEllensburgWashingtonUSA
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16
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Gaesser GA. Whole grain intake and pancreatic cancer risk. Hepatobiliary Surg Nutr 2021; 10:530-533. [PMID: 34430536 DOI: 10.21037/hbsn-21-221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Accepted: 06/25/2021] [Indexed: 11/06/2022]
Affiliation(s)
- Glenn A Gaesser
- College of Health Solutions, Arizona State University, Phoenix, AZ, USA
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17
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Gaesser GA, Miller Jones J, Angadi SS. Perspective: Does Glycemic Index Matter for Weight Loss and Obesity Prevention? Examination of the Evidence on "Fast" Compared with "Slow" Carbs. Adv Nutr 2021; 12:2076-2084. [PMID: 34352885 PMCID: PMC8634321 DOI: 10.1093/advances/nmab093] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2021] [Revised: 06/28/2021] [Accepted: 07/07/2021] [Indexed: 02/01/2023] Open
Abstract
High-glycemic index (high-GI) foods (so-called fast carbs) have been hypothesized to promote fat storage and increase risk of obesity. To clarify whether dietary GI impacts body weight, we searched PubMed and the Cochrane Database of Systematic Reviews for observational studies reporting associations between BMI and dietary GI, and for meta-analyses of randomized controlled trials (RCTs) comparing low-GI and high-GI diets for weight loss. Data on 43 cohorts from 34 publications, totaling 1,940,968 adults, revealed no consistent differences in BMI when comparing the highest with the lowest dietary GI groups. In the 27 cohort studies that reported results of statistical comparisons, 70% showed that BMI was either not different between the highest and lowest dietary GI groups (12 of 27 cohorts) or that BMI was lower in the highest dietary GI group (7 of 27 cohorts). Results of 30 meta-analyses of RCTs from 8 publications demonstrated that low-GI diets were generally no better than high-GI diets for reducing body weight or body fat. One notable exception is that low-GI diets with a dietary GI at least 20 units lower than the comparison diet resulted in greater weight loss in adults with normal glucose tolerance but not in adults with impaired glucose tolerance. While carbohydrate quality, including GI, impacts many health outcomes, GI as a measure of carbohydrate quality appears to be relatively unimportant as a determinant of BMI or diet-induced weight loss. Based on results from observational cohort studies and meta-analyses of RCTs, we conclude that there is scant scientific evidence that low-GI diets are superior to high-GI diets for weight loss and obesity prevention.
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Affiliation(s)
| | - Julie Miller Jones
- Department of Family, Consumer, and Nutritional Science, St. Catherine University, Minneapolis, MN, USA
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18
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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19
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Papanikolaou Y, Slavin JL, Clemens R, Brenna JT, Hayes D, Gaesser GA, Fulgoni VL. Do Refined Grains Have a Place in a Healthy Dietary Pattern: Perspectives from an Expert Panel Consensus Meeting. Curr Dev Nutr 2020; 4:nzaa125. [PMID: 33062912 PMCID: PMC7538308 DOI: 10.1093/cdn/nzaa125] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Revised: 06/17/2020] [Accepted: 07/14/2020] [Indexed: 11/14/2022] Open
Abstract
Although dietary guidance recommends increasing consumption of whole grains and concurrently limiting consumption of refined and/or enriched grain foods, emerging research suggests that certain refined grains may be part of a healthy dietary pattern. A scientific expert panel was convened to review published data since the release of 2015 dietary guidance in defined areas of grain research, which included nutrient intakes, diet quality, enrichment/fortification, and associations with weight-related outcomes. Based on a 1-d roundtable discussion, the expert panel reached consensus that 1) whole grains and refined grains can make meaningful nutrient contributions to dietary patterns, 2) whole and refined grain foods contribute nutrient density, 3) fortification and enrichment of grains remain vital in delivering nutrient adequacy in the American diet, 4) there is inconclusive scientific evidence that refined grain foods are linked to overweight and obesity, and 5) gaps exist in the scientific literature with regard to grain foods and health.
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Affiliation(s)
| | - Joanne L Slavin
- Department of Food Science and Nutrition, University of Minnesota, St. Paul, MN, USA
| | - Roger Clemens
- USC School of Pharmacy, University of Southern California, Los Angeles, CA, USA
| | - J Thomas Brenna
- Department of Pediatrics, Dell Medical School, University of Texas at Austin, Austin, TX, USA
| | | | - Glenn A Gaesser
- College of Health Solutions, Arizona State University, Phoenix, AZ, USA
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20
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Dickinson JM, Villanueva IR, Campbell JN, Medina SM, Jorgensen TM, Wilson SL, Serrano N, Angadi SS, Gaesser GA. The Impact Of Verification Phase Intensity For Determination Of VO 2 max In Older Adults. Med Sci Sports Exerc 2020. [DOI: 10.1249/01.mss.0000680192.41638.95] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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Joseph RP, Keller C, Vega-López S, Adams MA, English R, Hollingshead K, Hooker SP, Todd M, Gaesser GA, Ainsworth BE. A Culturally Relevant Smartphone-Delivered Physical Activity Intervention for African American Women: Development and Initial Usability Tests of Smart Walk. JMIR Mhealth Uhealth 2020; 8:e15346. [PMID: 32130198 PMCID: PMC7076402 DOI: 10.2196/15346] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 11/07/2019] [Accepted: 12/16/2019] [Indexed: 01/16/2023] Open
Abstract
Background Smart Walk is a culturally relevant, social cognitive theory–based, smartphone-delivered intervention designed to increase physical activity (PA) and reduce cardiometabolic disease risk among African American (AA) women. Objective This study aimed to describe the development and initial usability testing results of Smart Walk. Methods Smart Walk was developed in 5 phases. Phases 1 to 3 focused on initial intervention development, phase 4 involved usability testing, and phase 5 included intervention refinement based on usability testing results. In phase 1, a series of 9 focus groups with 25 AA women (mean age 38.5 years, SD 7.8; mean BMI 39.4 kg/m2, SD 7.3) was used to identify cultural factors associated with PA and ascertain how constructs of social cognitive theory can be leveraged in the design of a PA intervention. Phase 2 included the analysis of phase 1 qualitative data and development of the structured PA intervention. Phase 3 focused on the technical development of the smartphone app used to deliver the intervention. Phase 4 consisted of a 1-month usability trial of Smart Walk (n=12 women; mean age 35.0 years, SD 8.5; mean BMI 40 kg/m2, SD 5.0). Phase 5 included refinement of the intervention based on the usability trial results. Results The 5-phase process resulted in the development of the Smart Walk smartphone-delivered PA intervention. This PA intervention was designed to target social cognitive theory constructs of behavioral capability, outcome expectations, social support, self-efficacy, and self-regulation and address deep structure sociocultural characteristics of collectivism, racial pride, and body appearance preferences of AA women. Key features of the smartphone app included (1) personal profile pages, (2) multimedia PA promotion modules (ie, electronic text and videos), (3) discussion boards, and (4) a PA self-monitoring tool. Participants also received 3 PA promotion text messages each week. Conclusions The development process of Smart Walk was designed to maximize the usability, cultural relevance, and impact of the smartphone-delivered PA intervention.
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Affiliation(s)
- Rodney P Joseph
- Center for Health Promotion and Disease Prevention, Edson College of Nursing and Health Innovation, Arizona State University, Phoenix, AZ, United States
| | - Colleen Keller
- Center for Health Promotion and Disease Prevention, Edson College of Nursing and Health Innovation, Arizona State University, Phoenix, AZ, United States
| | - Sonia Vega-López
- College of Health Solutions, Arizona State University, Phoenix, AZ, United States.,Southwest Interdisciplinary Research Center, Arizona State University, Phoenix, AZ, United States
| | - Marc A Adams
- College of Health Solutions, Arizona State University, Phoenix, AZ, United States
| | - Rebekah English
- Center for Health Promotion and Disease Prevention, Edson College of Nursing and Health Innovation, Arizona State University, Phoenix, AZ, United States
| | - Kevin Hollingshead
- College of Health Solutions, Arizona State University, Phoenix, AZ, United States
| | - Steven P Hooker
- College of Health and Human Services, San Diego State University, San Diego, CA, United States
| | - Michael Todd
- Edson College of Nursing and Health Innovation, Arizona State University, Phoenix, AZ, United States
| | - Glenn A Gaesser
- College of Health Solutions, Arizona State University, Phoenix, AZ, United States
| | - Barbara E Ainsworth
- College of Health Solutions, Arizona State University, Phoenix, AZ, United States.,Shanghai University of Sport, Yangpu Qu, Shanghai Shi, China
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22
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Whisner CM, Angadi SS, Weltman NY, Weltman A, Rodriguez J, Patrie JT, Gaesser GA. Effects of Low-Fat and High-Fat Meals, with and without Dietary Fiber, on Postprandial Endothelial Function, Triglyceridemia, and Glycemia in Adolescents. Nutrients 2019; 11:nu11112626. [PMID: 31684015 PMCID: PMC6893531 DOI: 10.3390/nu11112626] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2019] [Revised: 10/09/2019] [Accepted: 10/17/2019] [Indexed: 01/05/2023] Open
Abstract
The consumption of fiber-rich foods may negate the deleterious effects of high-fat meals on postprandial triglyceridemia and endothelial function. Despite supportive data in adults, little is known about the effects of high-fat and high-fiber foods on cardiovascular health parameters in pediatric populations. In this crossover trial, male and female adolescents (n = 10; 14.1 + 2.6 years; range 10–17 years) consumed (1) low-fat, low-fiber, (2) low-fat, high-fiber, (3) high-fat, low-fiber, and (4) high-fat, high-fiber breakfast meals in randomized order, each following an overnight fast. Baseline and 4 h post-meal blood was obtained for determination of glucose, insulin and triglyceride concentrations. Endothelial function was assessed via brachial artery flow-mediated dilation (FMD). Postprandial FMD was not significantly changed after any meal. However, regression analyses revealed a significant inverse relationship between the change in 4 h triglyceride concentration and change in 4 h FMD for the high-fat, low-fiber meal (β = −0.087; 95% CI = −0.138 to −0.037; p = 0.001) that was no longer significant in the high-fat, high-fiber meal (β = −0.044; 95% CI = −0.117 to 0.029; p = 0.227). Interpretation of these analyses must be qualified by acknowledging that between-meal comparison revealed that the two regression lines were not statistically different (p = 0.226). Addition of high-fiber cereal to the high-fat meal also reduced 4 h postprandial triglyceride increases by ~50% (p = 0.056). A high-fiber breakfast cereal did not attenuate postprandial glucose and insulin responses after consumption of a low-fat meal. While further work is needed to confirm these results in larger cohorts, our findings indicate the potential importance of cereal fiber in blunting the inverse relationship between postprandial hypertriglyceridemia and FMD after consumption of a high-fat meal in adolescents.
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Affiliation(s)
- Corrie M Whisner
- College of Health Solutions, Arizona State University, 550 N Third St., Phoenix, AZ 85004, USA.
| | - Siddhartha S Angadi
- College of Health Solutions, Arizona State University, 550 N Third St., Phoenix, AZ 85004, USA.
| | - Nathan Y Weltman
- Department of Anesthesiology, Perioperative and Pain Management, Brigham and Women's Hospital, Boston, MA 02115, USA.
| | - Arthur Weltman
- Department of Kinesiology, University of Virginia, Charlottesville, VA 22903, USA.
| | | | - James T Patrie
- Department of Public Health, University of Virginia, Charlottesville, VA 22903, USA.
| | - Glenn A Gaesser
- College of Health Solutions, Arizona State University, 550 N Third St., Phoenix, AZ 85004, USA.
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23
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Gaesser GA, Rodriguez J, Patrie JT, Whisner CM, Angadi SS. Effects of Glycemic Index and Cereal Fiber on Postprandial Endothelial Function, Glycemia, and Insulinemia in Healthy Adults. Nutrients 2019; 11:nu11102387. [PMID: 31590437 PMCID: PMC6835298 DOI: 10.3390/nu11102387] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 09/11/2019] [Accepted: 09/26/2019] [Indexed: 02/07/2023] Open
Abstract
Both glycemic index and dietary fiber are associated with cardiovascular disease risk, which may be related in part to postprandial vascular effects. We examined the effects of both glycemic index (GI) and dietary (mainly cereal) fiber on postprandial endothelial function. Eleven adults (5 men; 6 women; age = 42.4 ± 16.1 years; weight = 70.5 ± 10.7 kg; height = 173.7 ± 8.7 cm) consumed four different breakfast meals on separate, randomized occasions: High-Fiber, Low-GI (HF-LGI: Fiber = 20.4 g; GI = 44); Low-Fiber, Low-GI (LF-LGI: Fiber = 4.3 g; GI = 43); Low-Fiber, High-GI (LF-HGI: Fiber = 3.6 g; GI = 70); High-Fiber, High-GI (HF-HGI: Fiber = 20.3 g; GI = 71). Meals were equal in total kcal (~600) and macronutrient composition (~90 g digestible carbohydrate; ~21 g protein; ~15 g fat). The HF-LGI meal resulted in a significant increase in flow-mediated dilation (FMD) 4 h after meal ingestion (7.8% ± 5.9% to 13.2% ± 5.5%; p = 0.02). FMD was not changed after the other meals. Regardless of fiber content, low-GI meals resulted in ~9% lower 4-h glucose area under curve (AUC) (p < 0.05). The HF-LGI meal produced the lowest 4-h insulin AUC, which was ~43% lower than LF-HGI and HF-HGI (p < 0.001), and 28% lower than LF-LGI (p = 0.02). We conclude that in healthy adults, a meal with low GI and high in cereal fiber enhances postprandial endothelial function. Although the effect of a low-GI meal on reducing postprandial glucose AUC was independent of fiber, the effect of a low-GI meal on reducing postprandial insulin AUC was augmented by cereal fiber.
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Affiliation(s)
- Glenn A Gaesser
- College of Health Solutions, Arizona State University, Phoenix, AZ 85004, USA.
| | | | - James T Patrie
- Public Health Sciences, University of Virginia, Charlottesville, VA 22903, USA.
| | - Corrie M Whisner
- College of Health Solutions, Arizona State University, Phoenix, AZ 85004, USA.
| | - Siddhartha S Angadi
- College of Health Solutions, Arizona State University, Phoenix, AZ 85004, USA.
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24
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Serrano N, D'Lugos AC, Ormsby JC, Thomas NT, Carroll CC, Marvasti FF, Gaesser GA, Dickinson JM. Relationships Among Skeletal Muscle Satellite Cells, Capillarization, And Vo2peak In Older Adults. Med Sci Sports Exerc 2019. [DOI: 10.1249/01.mss.0000560718.43860.5b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Wilson SL, D'Lugos AC, Serrano N, Jorgensen TM, Harper J, Gaesser GA, Dickinson JM, Angadi SS. Cardiovascular Adaptations During the Hormonal Transition of a Male-to-Female Transgender Athlete. Med Sci Sports Exerc 2019. [DOI: 10.1249/01.mss.0000562319.09371.00] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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26
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Gaesser GA. Perspective: Refined Grains and Health: Genuine Risk, or Guilt by Association? Adv Nutr 2019; 10:361-371. [PMID: 30947337 PMCID: PMC6520038 DOI: 10.1093/advances/nmy104] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 10/24/2018] [Accepted: 11/01/2018] [Indexed: 01/07/2023] Open
Abstract
Refined grain intake is widely assumed to be associated with adverse health outcomes, including increased risk for cardiovascular disease (CVD), type 2 diabetes (T2D), and obesity. The 2015 Dietary Guidelines Advisory Committee recommended that to improve dietary quality, the US population should replace most refined grains with whole grains. This recommendation was based largely on results from studies that examined dietary patterns, not separate food groups. A Western dietary pattern typically includes red and processed meat, sugar-sweetened foods and beverages, French fries, and high-fat dairy products, as well as refined grains, and has been linked to increased risk of many chronic diseases. However, when evaluated as a distinct food category, 11 meta-analyses of prospective cohort studies, which included a total of 32 publications with data from 24 distinct cohorts, demonstrated that refined grain intake was not associated with all-cause mortality, T2D, CVD, coronary heart disease (CHD), stroke, hypertension, or cancer. By contrast, consumption of red and processed meat was consistently associated with increased risk of these same health outcomes. Refined grain consumption up to 6-7 servings/d (1 serving = 30 g) was not associated with higher risk of CHD, T2D, hypertension, or all-cause mortality. Moreover, total grain intake was not associated with risk of CVD, CHD, stroke, or cancer, but was associated with lower risk of all-cause mortality. Consequently, the recommendation to reduce refined grain intake based on results from studies linking a Western dietary pattern to numerous adverse health outcomes is contrary to a substantial body of published scientific evidence. Future research needs to better define refined grain intake to distinguish between staple grain foods and indulgent grain foods, and to better design randomized controlled trials to resolve discrepancies between results from observational studies and such trials with regard to determining the benefits of whole grains compared with refined grains.
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Affiliation(s)
- Glenn A Gaesser
- College of Health Solutions, Arizona State University, Phoenix, AZ,Address correspondence to GAG (e-mail: )
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27
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Mullane SL, Rydell SA, Larouche ML, Toledo MJL, Feltes LH, Vuong B, Crespo NC, Gaesser GA, Estabrooks PA, Pereira MA, Buman MP. Enrollment Strategies, Barriers to Participation, and Reach of a Workplace Intervention Targeting Sedentary Behavior. Am J Health Promot 2019; 33:225-236. [PMID: 29986592 PMCID: PMC7702267 DOI: 10.1177/0890117118784228] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE To review enrollment strategies, participation barriers, and program reach of a large, 2-year workplace intervention targeting sedentary behavior. APPROACH Cross-sectional, retrospective review. SETTING Twenty-four worksites balanced across academic, industry, and government sectors in Minneapolis/Saint Paul (Minnesota) and Phoenix (Arizona) regions. PARTICIPANTS Full-time (≥30+ h/wk), sedentary office workers. METHODS Reach was calculated as the proportion of eligible employees who enrolled in the intervention ([N enrolled/(proportion of eligible employees × N total employees)] × 100). Mean (1 standard deviation) and median worksite sizes were calculated at each enrollment step. Participation barriers and modifications were recorded by the research team. A survey was sent to a subset of nonparticipants (N = 57), and thematic analyses were conducted to examine reasons for nonparticipation, positive impacts, and negative experiences. RESULTS Employer reach was 65% (56 worksites invited to participate; 66% eligible of 56 responses; 24 enrolled). Employee reach was 58% (1317 invited to participate, 83% eligible of 906 responses; 632 enrolled). Postrandomization, on average, 59% (15%) of the worksites participated. Eighteen modifications were developed to overcome participant-, context-, and research-related participation barriers. CONCLUSION A high proportion of worksites and employees approached to participate in a sedentary behavior reduction intervention engaged in the study. Interventions that provide flexible enrollment, graded participant engagement options, and adopt a participant-centered approach may facilitate workplace intervention success.
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Affiliation(s)
- Sarah L. Mullane
- School of Nutrition and Health Promotion, Arizona State University, Tempe, AZ, USA
| | - Sarah A. Rydell
- Division of Epidemiology and Community Health, University of Minnesota, Minneapolis, MN, USA
| | - Miranda L. Larouche
- School of Nutrition and Health Promotion, Arizona State University, Tempe, AZ, USA
| | | | | | | | - Noe C. Crespo
- Graduate School of Public Health, San Diego State University, San Diego, CA, USA
| | - Glenn A. Gaesser
- School of Nutrition and Health Promotion, Arizona State University, Tempe, AZ, USA
| | - Paul A. Estabrooks
- College of Public Health, University of Nebraska Medical Center, Omaha, NE, USA
| | - Mark A. Pereira
- Division of Epidemiology and Community Health, University of Minnesota, Minneapolis, MN, USA
| | - Matthew P. Buman
- School of Nutrition and Health Promotion, Arizona State University, Tempe, AZ, USA
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Joseph RP, Ainsworth BE, Vega-López S, Adams MA, Hollingshead K, Hooker SP, Todd M, Gaesser GA, Keller C. Rationale and design of Smart Walk: A randomized controlled pilot trial of a smartphone-delivered physical activity and cardiometabolic risk reduction intervention for African American women. Contemp Clin Trials 2019; 77:46-60. [PMID: 30576840 PMCID: PMC6344046 DOI: 10.1016/j.cct.2018.12.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 12/07/2018] [Accepted: 12/16/2018] [Indexed: 12/22/2022]
Abstract
BACKGROUND African American (AA) women perform low levels of physical activity (PA) and are disproportionally burdened by cardiometabolic disease conditions when compared to White women and the U.S. population as a whole. These disparities emphasize the need for innovative and effective interventions to increase PA and reduce cardiometabolic disease risk among AA women. Recent evidence suggests that mobile health (mHealth) interventions have the potential to increase PA and reduce cardiometabolic disease risk factors. Few studies have examined the efficacy of mHealth PA interventions among racial/ethnic minorities, including AA women. This represents a missed opportunity given the reported success of technology-delivered PA interventions in predominately White populations and the high use of technology among AA women. OBJECTIVE To describe the design, theoretical rationale, and cultural relevance of Smart Walk, a culturally sensitive smartphone-delivered PA intervention for AA women. DESIGN AND METHODS Smart Walk is an 8-month, randomized controlled pilot trial designed to increase PA and reduce cardiometabolic disease risk among AA women. Sixty physically inactive AA women with obesity will be assigned to receive either a culturally relevant intervention designed to increase PA (by targeting leisure-time, household chore/task-related, and occupational PA) or a culturally relevant wellness attention-matched control condition. Outcomes will be assessed at baseline, 4 months, and 8 months, and include feasibility and acceptability of the PA intervention and evaluation of effects on PA and cardiometabolic risk factors. SUMMARY Smart Walk represents a culturally relevant, theory-based approach to promote PA and reduce cardiometabolic disease risk in AA women.
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Affiliation(s)
- Rodney P Joseph
- Center for Health Promotion and Disease Prevention, College of Nursing and Health Innovation, Arizona State University, 500 N 3rd St, Phoenix, AZ 85004, USA.
| | - Barbara E Ainsworth
- College of Health Solutions, Arizona State University, 550 N 3rd St, Phoenix, AZ 85004, USA.
| | - Sonia Vega-López
- College of Health Solutions and Southwest Interdisciplinary Research Center, Arizona State University, 550 N 3rd St, Phoenix, AZ 85004, USA.
| | - Marc A Adams
- College of Health Solutions, Arizona State University, 550 N 3rd St, Phoenix, AZ 85004, USA.
| | - Kevin Hollingshead
- College of Health Solutions, Arizona State University, 550 N 3rd St, Phoenix, AZ 85004, USA.
| | - Steven P Hooker
- College of Health and Human Services, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182, USA.
| | - Michael Todd
- College of Nursing and Health Innovation, Arizona State University, 500 N 3rd St, Phoenix, AZ 85004, USA.
| | - Glenn A Gaesser
- College of Health Solutions, Arizona State University, 550 N 3rd St, Phoenix, AZ 85004, USA.
| | - Colleen Keller
- Center for Health Promotion and Disease Prevention, College of Nursing and Health Innovation, Arizona State University, 500 N 3rd St, Phoenix, AZ 85004, USA.
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Wilson SL, D’Lugos AC, Jorgensen TM, Harper J, Whisner CM, Dickinson JM, Gaesser GA, Angadi SS. Cardiometabolic Changes During The Hormonal Transition Of A Male-to-female Athlete. Med Sci Sports Exerc 2018. [DOI: 10.1249/01.mss.0000538446.17975.c9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Bhammar DM, Sawyer BJ, Tucker WJ, Gaesser GA. Breaks in Sitting Time: Effects on Continuously Monitored Glucose and Blood Pressure. Med Sci Sports Exerc 2018; 49:2119-2130. [PMID: 28514264 DOI: 10.1249/mss.0000000000001315] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
PURPOSE We examined the effects of interrupting prolonged sitting with multiple 2-min walking breaks or one 30-min continuous walking session on glucose control and ambulatory blood pressure (ABP). METHODS Ten overweight/obese, physically inactive participants (five men; 32 ± 5 yr; BMI, 30.3 ± 4.6 kg·m) participated in this randomized four-trial crossover study, with each trial performed on a separate, simulated workday lasting 9 h: 1) 30 min of continuous moderate-intensity (30-min MOD) walking at 71% ± 4% HRmax; 2) 21 × 2 min bouts of moderate-intensity (2-min MOD) walking at 53% ± 5% HRmax, each performed every 20 min (42 min total); 3) 8 × 2 min bouts of vigorous-intensity (2-min VIG) walking at 79% ± 4% HRmax, each performed every hour (16 min total); 4) 9 h of prolonged sitting (SIT). Participants underwent continuous interstitial glucose monitoring and ABP monitoring during and after the simulated workday spent in the laboratory, with primary data analysis from 12:30 h to 07:00 h the next morning. RESULTS Compared with SIT (5.6 ± 1.1 mmol·L), mean 18.7-h glucose was lower during the 2-min MOD (5.2 ± 1.1 mmol·L) and 2-min VIG (5.4 ± 0.9 mmol·L) trials and mean 18.7-h glucose during the 30-min MOD trial (5.1 ± 0.8 mmol·L) was lower than all other trials (P < 0.001). Postprandial glucose was approximately 7% to 13% lower during all trials compared with SIT (P < 0.001), with 30-min MOD having the greatest effect. Only the 30-min MOD trial was effective in reducing systolic ABP from 12:30 to 07:00 h (119 ± 15 mm Hg) when compared with SIT (122 ± 16 mm Hg; P < 0.05). CONCLUSIONS Replacing sitting with 2-min MOD walking every 20 min or 2 min of vigorous-intensity walking every hour during a simulated workday reduced 18.7 h and postprandial glucose, but only 30-min MOD walking was effective for reducing both glucose and systolic ABP.
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Affiliation(s)
- Dharini M Bhammar
- 1Exercise Science and Health Promotion, Healthy Lifestyles Research Center, Arizona State University, Phoenix, AZ; 2College of Nursing and Health Sciences, School of Health Sciences, Valdosta State University, Valdosta, GA; 3Departments of Kinesiology and Biology, Point Loma Nazarene University, San Diego, CA; and 4Department of Kinesiology, University of Texas at Arlington, Arlington, TX
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Abstract
To determine whether age affects cycling efficiency and the energy cost of walking (Cw), 190 healthy adults, ages 18-81 yr, cycled on an ergometer at 50 W and walked on a treadmill at 1.34 m/s. Ventilation and gas exchange at rest and during exercise were used to calculate net Cw and net efficiency of cycling. Compared with the 18-40 yr age group (2.17 ± 0.33 J·kg-1·m-1), net Cw was not different in the 60-64 yr (2.20 ± 0.40 J·kg-1·m-1) and 65-69 yr (2.20 ± 0.28 J·kg-1·m-1) age groups, but was significantly ( P < 0.03) higher in the ≥70 yr (2.37 ± 0.33 J·kg-1·m-1) age group. For subjects >60 yr, net Cw was significantly correlated with age ( R2 = 0.123; P = 0.002). Cycling net efficiency was not different between 18-40 yr (23.5 ± 2.9%), 60-64 yr (24.5 ± 3.6%), 65-69 yr (23.3 ± 3.6%) and ≥70 yr (24.7 ± 2.7%) age groups. Repeat tests on a subset of subjects (walking, n = 43; cycling, n = 37) demonstrated high test-retest reliability [intraclass correlation coefficients (ICC), 0.74-0.86] for all energy outcome measures except cycling net energy expenditure (ICC = 0.54) and net efficiency (ICC = 0.50). Coefficients of variation for all variables ranged from 3.1 to 7.7%. Considerable individual variation in Cw and efficiency was evident, with a ~2-fold difference between the least and most economical/efficient subjects. We conclude that, between 18 and 81 yr, net Cw was only higher for ages ≥70 yr, and that cycling net efficiency was not different across age groups. NEW & NOTEWORTHY This study illustrates that the higher energy cost of walking in older adults is only evident for ages ≥70 yr. For older adults ages 60-69 yr, the energy cost of walking is similar to that of young adults. Cycling efficiency, by contrast, is not different across age groups. Considerable individual variation (∼2-fold) in cycling efficiency and energy cost of walking is observed in young and older adults.
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Affiliation(s)
- Glenn A Gaesser
- School of Nutrition and Health Promotion, Healthy Lifestyles Research Center, Arizona State University , Phoenix, Arizona
| | - Wesley J Tucker
- School of Nutrition and Health Promotion, Healthy Lifestyles Research Center, Arizona State University , Phoenix, Arizona
| | - Brandon J Sawyer
- School of Nutrition and Health Promotion, Healthy Lifestyles Research Center, Arizona State University , Phoenix, Arizona
| | - Dharini M Bhammar
- School of Nutrition and Health Promotion, Healthy Lifestyles Research Center, Arizona State University , Phoenix, Arizona
| | - Siddhartha S Angadi
- School of Nutrition and Health Promotion, Healthy Lifestyles Research Center, Arizona State University , Phoenix, Arizona
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Tucker WJ, Sawyer BJ, Jarrett CL, Bhammar DM, Ryder JR, Angadi SS, Gaesser GA. High-intensity interval exercise attenuates but does not eliminate endothelial dysfunction after a fast food meal. Am J Physiol Heart Circ Physiol 2017; 314:H188-H194. [PMID: 29101171 DOI: 10.1152/ajpheart.00384.2017] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We investigated whether two different bouts of high-intensity interval exercise (HIIE) could attenuate postprandial endothelial dysfunction. Thirteen young (27 ± 1 yr), nonexercise-trained men underwent three randomized conditions: 1) four 4-min intervals at 85-95% of maximum heart rate separated by 3 min of active recovery (HIIE 4 × 4), 2) 16 1-min intervals at 85-95% of maximum heart rate separated by 1 min of active recovery (HIIE 16 × 1), and 3) sedentary control. HIIE was performed in the afternoon, ~18 h before the morning fast food meal (1,250 kcal, 63g of fat). Brachial artery flow-mediated dilation (FMD) was performed before HIIE ( baseline 1), during fasting before meal ingestion ( baseline 2), and 30 min, 2 h, and 4 h postprandial. Capillary glucose and triglycerides were assessed at fasting, 30 min, 1 h, 2 h, and 4 h (triglycerides only). Both HIIE protocols increased fasting FMD compared with control (HIIE 4 × 4: 6.1 ± 0.4%, HIIE 16 × 1: 6.3 ± 0.5%, and control: 5.1 ± 0.4%, P < 0.001). For both HIIE protocols, FMD was reduced only at 30 min postprandial but never fell below baseline 1 or FMD during control at any time point. In contrast, control FMD decreased at 2 h (3.8 ± 0.4%, P < 0.001) and remained significantly lower than HIIE 4 × 4 and 16 × 1 at 2 and 4 h. Postprandial glucose and triglycerides were unaffected by HIIE. In conclusion, HIIE performed ~18 h before a high-energy fast food meal can attenuate but not entirely eliminate postprandial decreases in FMD. This effect is not dependent on reductions in postprandial lipemia or glycemia. NEW & NOTEWORTHY Two similar high-intensity interval exercise (HIIE) protocols performed ∼18 h before ingestion of a high-energy fast food meal attenuated but did not entirely eliminate postprandial endothelial dysfunction in young men largely by improving fasting endothelial function. Both HIIE protocols produced essentially identical results, suggesting high reproducibility of HIIE effects.
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Affiliation(s)
- Wesley J Tucker
- Exercise Science and Health Promotion, Healthy Lifestyles Research Center, Arizona State University , Phoenix, Arizona
| | - Brandon J Sawyer
- Exercise Science and Health Promotion, Healthy Lifestyles Research Center, Arizona State University , Phoenix, Arizona
| | - Catherine L Jarrett
- Exercise Science and Health Promotion, Healthy Lifestyles Research Center, Arizona State University , Phoenix, Arizona
| | - Dharini M Bhammar
- Exercise Science and Health Promotion, Healthy Lifestyles Research Center, Arizona State University , Phoenix, Arizona
| | - Justin R Ryder
- Exercise Science and Health Promotion, Healthy Lifestyles Research Center, Arizona State University , Phoenix, Arizona
| | - Siddhartha S Angadi
- Exercise Science and Health Promotion, Healthy Lifestyles Research Center, Arizona State University , Phoenix, Arizona
| | - Glenn A Gaesser
- Exercise Science and Health Promotion, Healthy Lifestyles Research Center, Arizona State University , Phoenix, Arizona
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Affiliation(s)
- Siddhartha S Angadi
- Arizona State University, Healthy Lifestyles Research Center, Phoenix, AZ 85004, USA.
| | - Glenn A Gaesser
- Arizona State University, Healthy Lifestyles Research Center, Phoenix, AZ 85004, USA
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Dickinson JM, D’Lugos AC, Naymik M, De Both M, Siniard A, Wolfe A, Curtis D, Gaesser GA, Huentelman MJ, Carroll CC. Transcriptional Signatures of Human Skeletal Muscle in Response to Aerobic and Resistance Exercise. Med Sci Sports Exerc 2017. [DOI: 10.1249/01.mss.0000517801.65200.34] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Angadi SS, Jarrett CL, Tucker WJ, Sawyer BJ, Zeigler ZS, Gaesser GA. Cardiorespiratory Fitness and Adiposity do not Predict Vascular Reactivity in Sedentary Men and Women. Med Sci Sports Exerc 2017. [DOI: 10.1249/01.mss.0000519184.45806.33] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Huwa KE, Sawyer BJ, Buman MP, Gaesser GA. Effects of High-intensity Interval Training and Moderate-intensity Continuous Training on Sleep in Sedentary Obese Adults. Med Sci Sports Exerc 2017. [DOI: 10.1249/01.mss.0000519330.44678.49] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Jarrett CL, Tucker WJ, D’Lugos AC, Dickinson JM, Angadi SS, Gaesser GA. Changes in Endothelial Function Following Fat Sugar Snacking With and Without Exercise Training. Med Sci Sports Exerc 2017. [DOI: 10.1249/01.mss.0000516933.49184.26] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Tucker WJ, Jarrett CL, D’Lugos AC, Dickinson JM, Angadi SS, Gaesser GA. Effect Of Fat-sugar Snacking, With And Without Exercise Training, On Body Composition And Cardiometabolic Fitness. Med Sci Sports Exerc 2017. [DOI: 10.1249/01.mss.0000519697.46050.f7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Mullane SL, Buman MP, Zeigler ZS, Crespo NC, Gaesser GA. Acute effects on cognitive performance following bouts of standing and light-intensity physical activity in a simulated workplace environment. J Sci Med Sport 2017; 20:489-493. [DOI: 10.1016/j.jsams.2016.09.015] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 08/19/2016] [Accepted: 09/30/2016] [Indexed: 01/10/2023]
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D’Lugos AC, Patel SH, Ormsby JC, Mahmood TN, Curtis DP, Gaesser GA, Fry CS, Carroll CC, Dickinson JM. The Impact of Acetaminophen Consumption on mTOR Signaling in Human Skeletal Muscle Following Resistance Exercise. Med Sci Sports Exerc 2017. [DOI: 10.1249/01.mss.0000519143.76300.71] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Angadi SS, Jarrett CL, Sherif M, Gaesser GA, Mookadam F. The effect of exercise training on biventricular myocardial strain in heart failure with preserved ejection fraction. ESC Heart Fail 2017; 4:356-359. [PMID: 28772048 PMCID: PMC5542728 DOI: 10.1002/ehf2.12149] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Revised: 12/08/2016] [Accepted: 02/17/2017] [Indexed: 01/12/2023] Open
Abstract
Aims High‐intensity interval training (HIIT) improves peak oxygen uptake and left ventricular diastology in patients with heart failure with preserved ejection fraction (HFpEF). However, its effects on myocardial strain in HFpEF remain unknown. We explored the effects of HIIT and moderate‐intensity aerobic continuous training (MI‐ACT) on left and right ventricular strain parameters in patients with HFpEF. Furthermore, we explored their relationship with peak oxygen uptake (VO2peak). Methods and results Fifteen patients with HFpEF (age = 70 ± 8.3 years) were randomized to either: (i) HIIT (4 × 4 min, 85–90% peak heart rate, interspersed with 3 min of active recovery; n = 9) or (ii) MI‐ACT (30 min at 70% peak heart rate; n = 6). Patients were trained 3 days/week for 4 weeks and underwent VO2peak testing and 2D echocardiography at baseline and after completion of the 12 sessions of supervised exercise training. Left ventricular (LV) and right ventricular (RV) average global peak systolic longitudinal strain (GLS) and peak systolic longitudinal strain rate (GSR) were quantified. Paired t‐tests were used to examine within‐group differences and unpaired t‐tests used for between‐group differences (α = 0.05). Right ventricular average global peak systolic longitudinal strain improved significantly in the HIIT group after training (pre = −18.4 ± 3.2%, post = −21.4 ± 1.7%; P = 0.02) while RV‐GSR, LV‐GLS, and LV‐GSR did not (P > 0.2). No significant improvements were observed following MI‐ACT. No significant between‐group differences were observed for any strain measure. ΔLV‐GLS and ΔRV‐GLS were modestly correlated with ΔVO2peak (r = −0.48 and r = −0.45; P = 0.1, respectively). Conclusions In patients with HFpEF, 4 weeks of HIIT significantly improved RV‐GLS.
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Affiliation(s)
- Siddhartha S Angadi
- School of Nutrition and Health Promotion, Arizona State University, Phoenix, AZ, USA.,Department of Cardiovascular Diseases, Mayo Clinic Arizona, Scottsdale, AZ, USA
| | - Catherine L Jarrett
- School of Nutrition and Health Promotion, Arizona State University, Phoenix, AZ, USA
| | - Moustafa Sherif
- Department of Cardiovascular Diseases, Mayo Clinic Arizona, Scottsdale, AZ, USA
| | - Glenn A Gaesser
- School of Nutrition and Health Promotion, Arizona State University, Phoenix, AZ, USA
| | - Farouk Mookadam
- Department of Cardiovascular Diseases, Mayo Clinic Arizona, Scottsdale, AZ, USA
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Buman MP, Mullane SL, Toledo MJ, Rydell SA, Gaesser GA, Crespo NC, Hannan P, Feltes L, Vuong B, Pereira MA. An intervention to reduce sitting and increase light-intensity physical activity at work: Design and rationale of the 'Stand & Move at Work' group randomized trial. Contemp Clin Trials 2017; 53:11-19. [PMID: 27940181 PMCID: PMC5274555 DOI: 10.1016/j.cct.2016.12.008] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Revised: 11/29/2016] [Accepted: 12/03/2016] [Indexed: 01/01/2023]
Abstract
BACKGROUND American workers spend 70-80% of their time at work being sedentary. Traditional approaches to increase moderate-vigorous physical activity (MVPA) may be perceived to be harmful to productivity. Approaches that target reductions in sedentary behavior and/or increases in standing or light-intensity physical activity [LPA] may not interfere with productivity and may be more feasible to achieve through small changes accumulated throughout the workday METHODS/DESIGN: This group randomized trial (i.e., cluster randomized trial) will test the relative efficacy of two sedentary behavior focused interventions in 24 worksites across two states (N=720 workers). The MOVE+ intervention is a multilevel individual, social, environmental, and organizational intervention targeting increases in light-intensity physical activity in the workplace. The STAND+ intervention is the MOVE+ intervention with the addition of the installation and use of sit-stand workstations to reduce sedentary behavior and enhance light-intensity physical activity opportunities. Our primary outcome will be objectively-measured changes in sedentary behavior and light-intensity physical activity over 12months, with additional process measures at 3months and longer-term sustainability outcomes at 24months. Our secondary outcomes will be a clustered cardiometabolic risk score (comprised of fasting glucose, insulin, triglycerides, HDL-cholesterol, and blood pressure), workplace productivity, and job satisfaction DISCUSSION: This study will determine the efficacy of a multi-level workplace intervention (including the use of a sit-stand workstation) to reduce sedentary behavior and increase LPA and concomitant impact on cardiometabolic health, workplace productivity, and satisfaction. TRIAL REGISTRATION ClinicalTrials.gov Identifier: NCT02566317 (date of registration: 10/1/2015).
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Affiliation(s)
- Matthew P Buman
- School of Nutrition and Health Promotion, Arizona State University, 550 N 3rd Street, Phoenix, AZ 85004, United States.
| | - Sarah L Mullane
- School of Nutrition and Health Promotion, Arizona State University, 550 N 3rd Street, Phoenix, AZ 85004, United States
| | - Meynard J Toledo
- School of Nutrition and Health Promotion, Arizona State University, 550 N 3rd Street, Phoenix, AZ 85004, United States
| | - Sarah A Rydell
- Division of Epidemiology and Community Health, University of Minnesota, 1300 S. 2nd Street, Minneapolis, MN 55454, United States
| | - Glenn A Gaesser
- School of Nutrition and Health Promotion, Arizona State University, 550 N 3rd Street, Phoenix, AZ 85004, United States
| | - Noe C Crespo
- School of Nutrition and Health Promotion, Arizona State University, 550 N 3rd Street, Phoenix, AZ 85004, United States; Graduate School of Public Health, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182, United States
| | - Peter Hannan
- Division of Epidemiology and Community Health, University of Minnesota, 1300 S. 2nd Street, Minneapolis, MN 55454, United States
| | - Linda Feltes
- State of Minnesota Management and Budget, 400 Centennial Office Building, Saint Paul, MN 55155, United States
| | - Brenna Vuong
- Fairview Health Services, 2344 Energy Park Drive, Saint Paul, MN 55108, United States
| | - Mark A Pereira
- Division of Epidemiology and Community Health, University of Minnesota, 1300 S. 2nd Street, Minneapolis, MN 55454, United States
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Tucker WJ, Angadi SS, Gaesser GA. Excess Postexercise Oxygen Consumption After High-Intensity and Sprint Interval Exercise, and Continuous Steady-State Exercise. J Strength Cond Res 2016; 30:3090-3097. [DOI: 10.1519/jsc.0000000000001399] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Abstract
We compared SenseWear Armband versions (v) 2.2 and 5.2 for estimating energy expenditure in healthy adults. Thirty-four adults (26 women), 30.1 ± 8.7 years old, performed two trials that included light-, moderate- and vigorous-intensity activities: (1) structured routine: seven activities performed for 8-min each, with 4-min of rest between activities; (2) semi-structured routine: 12 activities performed for 5-min each, with no rest between activities. Energy expenditure was measured by indirect calorimetry and predicted using SenseWear v2.2 and v5.2. Compared to indirect calorimetry (297.8 ± 54.2 kcal), the total energy expenditure was overestimated (P < 0.05) by both SenseWear v2.2 (355.6 ± 64.3 kcal) and v5.2 (342.6 ± 63.8 kcal) during the structured routine. During the semi-structured routine, the total energy expenditure for SenseWear v5.2 (275.2 ± 63.0 kcal) was not different than indirect calorimetry (262.8 ± 52.9 kcal), and both were lower (P < 0.05) than v2.2 (312.2 ± 74.5 kcal). The average mean absolute per cent error was lower for the SenseWear v5.2 than for v2.2 (P < 0.001). SenseWear v5.2 improved energy expenditure estimation for some activities (sweeping, loading/unloading boxes, walking), but produced larger errors for others (cycling, rowing). Although both algorithms overestimated energy expenditure as well as time spent in moderate-intensity physical activity (P < 0.05), v5.2 offered better estimates than v2.2.
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Affiliation(s)
- Dharini M Bhammar
- a Exercise Science and Health Promotion, Healthy Lifestyles Research Center , Arizona State University , Phoenix , AZ , USA
- b Department of Exercise Physiology, College of Nursing and Health Sciences , Valdosta State University , Valdosta , GA , USA
| | - Brandon J Sawyer
- a Exercise Science and Health Promotion, Healthy Lifestyles Research Center , Arizona State University , Phoenix , AZ , USA
- c Departments of Kinesiology and Biology , Point Loma Nazarene University , San Diego , CA , USA
| | - Wesley J Tucker
- a Exercise Science and Health Promotion, Healthy Lifestyles Research Center , Arizona State University , Phoenix , AZ , USA
| | - Jung-Min Lee
- d School of Health, Physical Education and Recreation , University of Nebraska at Omaha , Omaha , NE , USA
| | - Glenn A Gaesser
- a Exercise Science and Health Promotion, Healthy Lifestyles Research Center , Arizona State University , Phoenix , AZ , USA
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Tucker WJ, Sawyer BJ, Jarrett CL, Bhammar DM, Gaesser GA. Physiological Responses to High-Intensity Interval Exercise Differing in Interval Duration. J Strength Cond Res 2016; 29:3326-35. [PMID: 25970496 DOI: 10.1519/jsc.0000000000001000] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
We determined the oxygen uptake (V[Combining Dot Above]O2), heart rate (HR), and blood lactate responses to 2 high-intensity interval exercise protocols differing in interval length. On separate days, 14 recreationally active males performed a 4 × 4 (four 4-minute intervals at 90-95% HRpeak, separated by 3-minute recovery at 50 W) and 16 × 1 (sixteen 1-minute intervals at 90-95% HRpeak, separated by 1-minute recovery at 50 W) protocol on a cycle ergometer. The 4 × 4 elicited a higher mean V[Combining Dot Above]O2 (2.44 ± 0.4 vs. 2.36 ± 0.4 L·min) and "peak" V[Combining Dot Above]O2 (90-99% vs. 76-85% V[Combining Dot Above]O2peak) and HR (95-98% HRpeak vs. 81-95% HRpeak) during the high-intensity intervals. Average power maintained was higher for the 16 × 1 (241 ± 45 vs. 204 ± 37 W), and recovery interval V[Combining Dot Above]O2 and HR were higher during the 16 × 1. No differences were observed for blood lactate concentrations at the midpoint (12.1 ± 2.2 vs. 10.8 ± 3.1 mmol·L) and end (10.6 ± 1.5 vs. 10.6 ± 2.4 mmol·L) of the protocols or ratings of perceived exertion (7.0 ± 1.6 vs. 7.0 ± 1.4) and Physical Activity Enjoyment Scale scores (91 ± 15 vs. 93 ± 12). Despite a 4-fold difference in interval duration that produced greater between-interval transitions in V[Combining Dot Above]O2 and HR and slightly higher mean V[Combining Dot Above]O2 during the 4 × 4, mean HR during each protocol was the same, and both protocols were rated similarly for perceived exertion and enjoyment. The major difference was that power output had to be reduced during the 4 × 4 protocol to maintain the desired HR.
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Affiliation(s)
- Wesley J Tucker
- 1Exercise Science and Health Promotion Program, Healthy Lifestyles Research Center, Arizona State University, Phoenix, Arizona; Departments of 2Kinesiology; 3Biology, Point Loma Nazarene University, San Diego, California; and 4Institute for Exercise and Environmental Medicine, Texas Southwestern Medical Center, Dallas, Texas
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Sawyer BJ, Tucker WJ, Bhammar DM, Gaesser GA. Using a Verification Test for Determination of V[Combining Dot Above]O2max in Sedentary Adults With Obesity. J Strength Cond Res 2016; 29:3432-8. [PMID: 26382135 DOI: 10.1519/jsc.0000000000001199] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
A constant-load exercise bout to exhaustion after a graded exercise test to verify maximal oxygen uptake (V[Combining Dot Above]O2max) during cycle ergometry has not been evaluated in sedentary adults with obesity. Nineteen sedentary men (n = 10) and women (n = 9) with obesity (age = 35.8 ± 8.6 years; body mass index [BMI] = 35.9 ± 5.1 kg·m; body fat percentage = 44.9 ± 7.2) performed a ramp-style maximal exercise test (ramp), followed by 5-10 minutes of active recovery, and then performed a constant-load exercise bout to exhaustion (verification test) on a cycle ergometer for determination of V[Combining Dot Above]O2max and maximal heart rate (HRmax). V[Combining Dot Above]O2max did not differ between tests (ramp: 2.29 ± 0.71 L·min, verification: 2.34 ± 0.67 L·min; p = 0.38). Maximal heart rate was higher on the verification test (177 ± 13 b·min vs. 174 ± 16 b·min; p = 0.03). Thirteen subjects achieved a V[Combining Dot Above]O2max during the verification test that was ≥2% (range: 2.0-21.0%; 0.04-0.47 L·min) higher than during the ramp test, and 8 subjects achieved a HRmax during the verification test that was 4-14 b·min higher than during the ramp test. Duration of verification or ramp tests did not affect V[Combining Dot Above]O2max results, but the difference in HRmax between the tests was inversely correlated with ramp test duration (r = -0.57, p = 0.01). For both V[Combining Dot Above]O2max and HRmax, differences between ramp and verification tests were not correlated with BMI or body fat percentage. A verification test may be useful for identifying the highest V[Combining Dot Above]O2max and HRmax during cycle ergometry in sedentary adults with obesity.
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Affiliation(s)
- Brandon J Sawyer
- Departments of 1Kinesiology and 2Biology, Point Loma Nazarene University, San Diego, California; 3Healthy Lifestyles Research Center, Exercise Science and Health Promotion Program, Arizona State University, Phoenix, Arizona; and 4Institute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital Dallas and UT Southwestern Medical Center Dallas, Dallas, Texas
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Abstract
We examined the effects of 3 exercise bouts, differing markedly in intensity, on postexercise hypotension (PEH). Eleven young adults (age: 24.6 ± 3.7 years) completed 4 randomly assigned experimental conditions: (a) control, (b) 30-minute steady-state exercise (SSE) at 75-80% maximum heart rate (HRmax), (4) aerobic interval exercise (AIE): four 4-minute bouts at 90-95% HRmax, separated by 3 minutes of active recovery, and (d) sprint interval exercise (SIE): six 30-second Wingate sprints, separated by 4 minutes of active recovery. Exercise was performed on a cycle ergometer. Blood pressure (BP) was measured before exercise and every 15-minute postexercise for 3 hours. Linear mixed models were used to compare BP between trials. During the 3-hour postexercise, systolic BP (SBP) was lower (p < 0.001) after AIE (118 ± 10 mm Hg), SSE (121 ± 10 mm Hg), and SIE (121 ± 11 mm Hg) compared with control (124 ± 8 mm Hg). Diastolic BP (DBP) was also lower (p < 0.001) after AIE (66 ± 7 mm Hg), SSE (69 ± 6 mm Hg), and SIE (68 ± 8 mm Hg) compared with control (71 ± 7 mm Hg). Only AIE resulted in sustained (>2 hours) PEH, with SBP (120 ± 9 mm Hg) and DBP (68 ± 7 mm Hg) during the third-hour postexercise being lower (p ≤ 0.05) than control (124 ± 8 and 70 ± 7 mm Hg). Although all exercise bouts produced similar reductions in BP at 1-hour postexercise, the duration of PEH was greatest after AIE.
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Affiliation(s)
- Siddhartha S Angadi
- 1Healthy Lifestyles Research Center, School of Nutrition and Health Promotion, Arizona State University, Phoenix, Arizona; and 2Department of Internal Medicine, Pulmonary and Critical Care Medicine Unit, Institute for Exercise and Environmental Medicine, Texas Health Presbyterian Hospital, University of Texas Southwestern Medical Center, Dallas, Texas
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Sawyer BJ, Tucker WJ, Bhammar DM, Ryder JR, Sweazea KL, Gaesser GA. Effects of high-intensity interval training and moderate-intensity continuous training on endothelial function and cardiometabolic risk markers in obese adults. J Appl Physiol (1985) 2016; 121:279-88. [PMID: 27255523 DOI: 10.1152/japplphysiol.00024.2016] [Citation(s) in RCA: 112] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Accepted: 05/27/2016] [Indexed: 12/18/2022] Open
Abstract
We hypothesized that high-intensity interval training (HIIT) would be more effective than moderate-intensity continuous training (MICT) at improving endothelial function and maximum oxygen uptake (V̇o2 max) in obese adults. Eighteen participants [35.1 ± 8.1 (SD) yr; body mass index = 36.0 ± 5.0 kg/m(2)] were randomized to 8 wk (3 sessions/wk) of either HIIT [10 × 1 min, 90-95% maximum heart rate (HRmax), 1-min active recovery] or MICT (30 min, 70-75% HRmax). Brachial artery flow-mediated dilation (FMD) increased after HIIT (5.13 ± 2.80% vs. 8.98 ± 2.86%, P = 0.02) but not after MICT (5.23 ± 2.82% vs. 3.05 ± 2.76%, P = 0.16). Resting artery diameter increased after MICT (3.68 ± 0.58 mm vs. 3.86 ± 0.58 mm, P = 0.02) but not after HIIT (4.04 ± 0.70 mm vs. 4.09 ± 0.70 mm; P = 0.63). There was a significant (P = 0.02) group × time interaction in low flow-mediated constriction (L-FMC) between MICT (0.63 ± 2.00% vs. -2.79 ± 3.20%; P = 0.03) and HIIT (-1.04 ± 4.09% vs. 1.74 ± 3.46%; P = 0.29). V̇o2 max increased (P < 0.01) similarly after HIIT (2.19 ± 0.65 l/min vs. 2.64 ± 0.88 l/min) and MICT (2.24 ± 0.48 l/min vs. 2.55 ± 0.61 l/min). Biomarkers of cardiovascular risk and endothelial function were unchanged. HIIT and MICT produced different vascular adaptations in obese adults, with HIIT improving FMD and MICT increasing resting artery diameter and enhancing L-FMC. HIIT required 27.5% less total exercise time and ∼25% less energy expenditure than MICT.
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Affiliation(s)
- Brandon J Sawyer
- Arizona State University, School of Nutrition and Health Promotion, Phoenix, Arizona
| | - Wesley J Tucker
- Arizona State University, School of Nutrition and Health Promotion, Phoenix, Arizona
| | - Dharini M Bhammar
- Arizona State University, School of Nutrition and Health Promotion, Phoenix, Arizona
| | - Justin R Ryder
- Arizona State University, School of Nutrition and Health Promotion, Phoenix, Arizona
| | - Karen L Sweazea
- Arizona State University, School of Nutrition and Health Promotion, Phoenix, Arizona
| | - Glenn A Gaesser
- Arizona State University, School of Nutrition and Health Promotion, Phoenix, Arizona
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Tucker WJ, Jarrett CL, D’Lugos AC, Angadi SS, Dickinson JM, Gaesser GA. Changes In Spontaneous Physical Activity During Supplemental Feeding And Exercise Training In Overweight /Obese Males. Med Sci Sports Exerc 2016. [DOI: 10.1249/01.mss.0000487840.34966.7d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Jarrett CL, Sawyer BJ, Cabbage CM, Gaesser GA. Body Composition And Physical Activity Maintenance One Year After A 12-week Exercise Intervention In Women. Med Sci Sports Exerc 2016. [DOI: 10.1249/01.mss.0000485656.26173.e0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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