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Sex differences in estimates of cardiac autonomic function using heart rate variability: effects of dietary capsaicin. Eur J Appl Physiol 2023; 123:1041-1050. [PMID: 36633663 DOI: 10.1007/s00421-023-05136-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 01/07/2023] [Indexed: 01/13/2023]
Abstract
PURPOSE Heart rate variability (HRV) estimates the autonomic nervous system (ANS) influence on the heart and appears sex-specific. Sensory afferents exhibit sex-specificity; although, it is unknown if Capsaicin, an agonist for transient receptor potential vanilloid channel-1 (TRPV1), alters cardiac ANS activity in a sex-dependent manner, which could be important given the predictive nature of HRV on risk of developing hypertension. Thus, we explored if there was sex-specificity in the effect of capsaicin on estimated cardiac ANS activity. METHODS HRV was measured in 38 young males (M: n = 25) and females (F: n = 13), in a blinded-crossover design, after acute ingestion of placebo or capsaicin. Resting HR, RR-interval, root-mean-square of successive differences (RMSSD), natural log-transformed RMSSD (LnRMSSD), standard deviation of n-n intervals (SDNN), number of pairs of successive n-n intervals differing by > 50 ms (NN50), and percent NN50 (PNN50) were obtained using standard techniques. RESULTS Significant sex differences were observed in mean HR (M: 59 ± 9.3 vs. F: 65 ± 12 beats/min, p = 0.036, η2 = 0.098), minimum HR (M: 47 ± 8.3 vs. F: 56 ± 12 beats/min, p = 0.014, η2 = 0.124), and NN50 (M: 177 ± 143 vs. F: 29 ± 17, p < 0.001, η2 = 0.249). There was a significant interaction of sex*treatment (p = 0.02, η2 = 0.027) for RMSSD, where males increased (78 ± 55 vs. 91 ± 64 ms), and females decreased (105 ± 83 vs. 76 ± 43 ms), placebo vs. capsaicin. CONCLUSION This controlled study recapitulates sex differences in HR and HRV, but revealed a sexual dimorphism in the parasympathetic response to capsaicin, perhaps due to differing TRPV1-afferent sensitivity, highlighting a potential mechanism for differential regulation of hemodynamics, and CVD risk, and should be considered in future studies.
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Oliveira CM, Novelli FI, Alves-Santos ÉT, Queiroz MG, Ghezzi AC, Cambri LT. Physical activity influences heart rate variability in young adults, regardless of dextrose ingestion. Blood Press Monit 2022; 27:220-226. [PMID: 35258021 DOI: 10.1097/mbp.0000000000000593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
INTRODUCTION Cardiac autonomic modulation can be altered by carbohydrate ingestion. On the other hand, some of the protective effects of physical activity may be due to its impact on the autonomic nervous system. PURPOSE This cross-sectional study was conducted to evaluate whether physical activity level influences heart rate variability (HRV) under fasting and mainly, after dextrose ingestion. METHODS Healthy adults aged 18-40 years ( n = 92; 54.35 % women) were separated into nonactive ( n = 47) and active groups ( n = 45), based on the physical activity level determined by International Physical Activity Questionnaire (IPAQ) and then compared. RESULTS There were no significant differences ( P > 0.05) for age, body mass, BMI, abdominal circumference, blood pressure, fasting glucose and blood glucose at 60 min after dextrose ingestion between groups. Body fat (%) was lower in the active group ( P = 0.02). The time-domain indices (RMSSD, SDNN and pNN50) were higher in the physically active group compared to the nonactive group (main effect of group, P < 0.01). The SDNN index was higher at 60 min after dextrose ingestion compared to fasting (main effect of time, P ≤ 0.01). However, no HRV indices showed significantly interaction effect (group x time; P > 0.05). CONCLUSION The magnitude of HRV responses to glucose was not influenced by physical activity status. Young adults who met at least the minimum physical activity recommendations showed a higher cardiac autonomic modulation, regardless of dextrose ingestion.
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Affiliation(s)
| | - Fabiula Isoton Novelli
- Physical Education Department, Graduate Program in Physical Education, Federal University of Mato Grosso, Cuiabá
- Medicine Department, Graduate Program in Sciences, University of São Paulo, São Paulo
| | | | - Marilene Gonçalves Queiroz
- Physical Education Department, Graduate Program in Health Sciences, Federal University of Mato Grosso, Cuiabá
| | | | - Lucieli Teresa Cambri
- Nutrition Department, Graduate Program in Nutrition, Foods and Metabolism
- Physical Education Department, Graduate Program in Physical Education, Federal University of Mato Grosso, Cuiabá
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Isotemporal Associations of Device-Measured Sedentary Time and Physical Activity with Cardiac-Autonomic Regulation in Previously Pregnant Women. Int J Behav Med 2022:10.1007/s12529-022-10113-6. [PMID: 35819720 PMCID: PMC9832172 DOI: 10.1007/s12529-022-10113-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/27/2022] [Indexed: 01/13/2023]
Abstract
BACKGROUND High sedentary time (ST) and low physical activity may increase cardiovascular risk, potentially though cardiac-autonomic dysregulation. This study investigated associations of statistically exchanging device-measured ST and physical activity with measures of cardiac-autonomic regulation in previously pregnant women. METHOD This cross-sectional, secondary analysis included 286 women (age = 32.6 ± 5.7 years; 68% white) measured 7-15 years after delivery. ST and light (LPA), moderate (MPA), vigorous (VPA), and moderate-to-vigorous (MVPA) intensity physical activity were measured by ActiGraph GT3X. ST was further partitioned into long (≥ 30 min) and short (< 30 min) bouts. MVPA was also partitioned into long (≥ 10 min) and short (< 10 min) bouts. Cardiac-autonomic regulation was assessed by heart rate variability (HRV) (resting heart rate, natural log transformed standard deviation of normal R-R intervals [lnSDNN], natural log-transformed root mean square of successive differences [lnRMSSD]) from a 5-min seated ECG. Progressive isotemporal substitution models adjusted for confounders. Sensitivity analyses removed women with related underlying medical conditions and who did not meet respiration rate criteria. RESULTS Initial analyses found no significant associations with HRV when exchanging 30 min of ST and physical activity (p > 0.05). Yet, replacing long- and short-bout ST with 30 min of long-bout MVPA yielded significantly higher (healthier) lnRMSSD (B = 0.063 ± 0.030 and B = 0.056 ± 0.027, respectively; both p < 0.05). Sensitivity analyses strengthened these associations and yielded further associations of higher lnSDNN and lnRMSSD when replacing 30 min of short-bout MVPA with equivalent amounts of long-bout MVPA (B = 0.074 ± 0.037 and B = 0.091 ± 0.046, respectively). CONCLUSION Replacing ST with long-bout MVPA is a potential strategy to improve cardiac-autonomic function in previously pregnant women.
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Christofaro DGD, Tebar WR, Vanderlei LCM, Fernandes RA, Mota J, Mielke GI, Ritti-Dias RM. Association of cardiac autonomic modulation with different intensities of physical activity in a small Brazilian inner city: a gender analysis. Eur J Sport Sci 2022; 23:649-655. [PMID: 35184676 DOI: 10.1080/17461391.2022.2044913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
AbstractPhysical activity has been linked to higher cardiac autonomic modulation. However, it is not clear in the literature which type of intensity of physical activity (sedentary, light, moderate, or vigorous) could be related to better cardiac autonomic modulation and whether this relationship is similar in men and women. The aim of this study was to analyze the relationship between cardiac autonomic modulation and the different intensities of physical activity in men and women. The sample included 100 men and 131 women. Cardiac autonomic modulation was obtained by heart rate variability (SDNN, RMSSD, LF un, HF un, SD1, and SD2). Time spent in different intensities (sedentary, light, moderate, and vigorous intensity physical activity) was measured using a waist-worn accelerometer for seven days. Linear regression was used to verify the relationship between physical activity and cardiac autonomic modulation, considering the adjustment for age, ethnicity, and socioeconomic level. Among men, a significant relationship of moderate intensity was observed with SDNN (β=2.442; p = 0.021) and SD2 (β=2.936, p = 0.028), and of vigorous intensity with SDNN (β=12.826, p = 0.028), RMSSD (β=16.370, p = 0.018), and SD1 (β=12.344, p = 0.025) indices. Among women, light-intensity physical activity was significantly related with LFnu (β= .655, p = 0.005) and HFnu (β= -.590, p = 0.010). Moderate and vigorous physical activity was associated with better cardiac autonomic modulation in men. Light physical activity was associated with lower sympathetic modulation in women.
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Affiliation(s)
- Diego G D Christofaro
- São Paulo State University (Unesp), School of Technology and Sciences, Presidente Prudente, Brazil
| | - William R Tebar
- Centro de Pesquisa Clínica e Epidemiológica, Hospital Universitário, Universidade de São Paulo (USP), Sao Paulo, Brazil
| | - Luiz Carlos M Vanderlei
- São Paulo State University (Unesp), School of Technology and Sciences, Presidente Prudente, Brazil
| | - Rômulo A Fernandes
- São Paulo State University (Unesp), School of Technology and Sciences, Presidente Prudente, Brazil
| | - Jorge Mota
- Research Center on Physical Activity, Health and Leisure (CIAFEL), Faculty of Sport, University of Porto, Porto, Portugal
| | - Gregore I Mielke
- School of Human Movement and Nutrition Sciences, The University of Queensland, Brisbane, Queensland, Australia
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Age-Related Differences in Cardiac Autonomic Control at Resting State and in Response to Mental Stress. Diagnostics (Basel) 2021; 11:diagnostics11122218. [PMID: 34943455 PMCID: PMC8700263 DOI: 10.3390/diagnostics11122218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 11/22/2021] [Accepted: 11/23/2021] [Indexed: 11/17/2022] Open
Abstract
Our goal was to investigate age-related differences in cardiac autonomic control by means of heart rate variability (HRV). For this purpose, 30 healthy older and 34 younger adults were studied during three different conditions: (i) during resting state, (ii) during the execution of two cognitive tasks, and (iii) during the subsequent recovery phase. Mean heart rate and HRV parameters were higher in younger compared to older participants during all three conditions. While the mean heart rate was higher in older adults during the cognitive tasks compared to the resting state, it did not change in younger adults. In contrast, the change in HRV during the three conditions did not differ between age groups. Our results suggest decreased parasympathetic activity reflecting declined cardiac autonomic control with aging. In conclusion, HRV analysis could support the assessment of normal age-related alterations in cardiac autonomic control at resting state and in response to cognitive demands.
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Castillo-Aguilar M, Valdés-Badilla P, Herrera-Valenzuela T, Guzmán-Muñoz E, Delgado-Floody P, Andrade DC, Moraes MM, Arantes RME, Núñez-Espinosa C. Cardiac Autonomic Modulation in Response to Muscle Fatigue and Sex Differences During Consecutive Competition Periods in Young Swimmers: A Longitudinal Study. Front Physiol 2021; 12:769085. [PMID: 34867474 PMCID: PMC8637437 DOI: 10.3389/fphys.2021.769085] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Accepted: 10/19/2021] [Indexed: 11/18/2022] Open
Abstract
Objective: To study the differences in cardiac autonomic modulation in response to muscle fatigue caused by high-intensity exercise during two consecutive competition periods in young swimmers. Methods: Twenty-six competitive swimmers, selected by their training volume, were separated in two groups, females (n = 12 [46%], age: 13.5 ± 1.4 years) and males (n = 14 [54%], age: 13.9 ± 1.7 years), aged between 10 and 16 years, were evaluated five times as follow: (i) 21 days before the first competition (t-0); (ii) two days before (t-1; t-3); and (iii) two days after (t-2; t-4) of the first and second competitions. Morphological measurements (body mass, percentage of total body fat and height), blood pressure, power, and resting heart rate variability (RR with Polar band) were recorded before and after Wingate test at each time. Results: Body fat was higher in females compared to males. However, no differences were found in other morphological parameters. An intra-subject analysis grouped by sex in cardiovascular parameters shows longitudinal variations in systolic pressure and mean pressure among females. Additionally, females depicted higher, very low frequency (VLF, which is intrinsically generated by the heart and strongly associated with emotional stress) after physical fatigue compared to males at t-1. Further, before the competition, the high frequency (HF) component of HRV (parasympathetic drive) was higher in males than females at t-0 and t-4. Conclusion: Our data revealed that males displayed greater parasympathetic reactivity after an anaerobic muscle fatigue test during their competition periods. Contrarily, females had a less cardiac autonomic modulation when comparing the pre-post Wingate test after two consecutive competition periods.
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Affiliation(s)
- Matías Castillo-Aguilar
- Kinesiology Department, University of Magallanes, Punta Arenas, Chile
- Austral Integrative Neurophysiology Group, CADI-UMAG, Punta Arenas, Chile
| | - Pablo Valdés-Badilla
- Department of Physical Activity Sciences, Faculty of Education Sciences, Universidad Católica del Maule, Talca, Chile
- Carrera de Entrenador Deportivo, Escuela de Educación, Universidad Viña del Mar, Viña del Mar, Chile
| | - Tomás Herrera-Valenzuela
- Department of Sports Sciences and Physical Activity, Faculty of Health, Universidad Santo Tomás (UST), Santiago, Chile
- Department of Physical Activity, Sports and Health Sciences, Faculty of Medical Sciences, Universidad de Santiago de Chile (USACH), Santiago, Chile
| | - Eduardo Guzmán-Muñoz
- Escuela de Kinesiología, Facultad de Salud, Universidad Santo Tomás, Santiago, Chile
| | - Pedro Delgado-Floody
- Department of Physical Education, Sports and Recreation, Universidad de La Frontera, Temuco, Chile
| | - David Cristóbal Andrade
- Centro de Investigación en Fisiología y Medicina de Altura (MedAlt), Facultad de Ciencias de la Salud, Universidad de Antofagasta, Antofagasta, Chile
| | - Michele M. Moraes
- Department of Pathology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
- Faculty of Medicine, Center for Newborn Screening and Genetics Diagnosis, Universidade Federal de Minas Gerais (NUPAD-FM/UFMG), Belo Horizonte, Brazil
| | - Rosa M. E. Arantes
- Department of Pathology, Institute of Biological Sciences, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
- Faculty of Medicine, Center for Newborn Screening and Genetics Diagnosis, Universidade Federal de Minas Gerais (NUPAD-FM/UFMG), Belo Horizonte, Brazil
| | - Cristian Núñez-Espinosa
- Austral Integrative Neurophysiology Group, CADI-UMAG, Punta Arenas, Chile
- School of Medicine, University of Magallanes, Punta Arenas, Chile
- Interuniversity Center for Healthy Aging, Chile
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Alansare AB, Gibbs BB, Catov JM, Jennings JR, Kline CE, Nagle E, Holzman C. Association of Physical Activity and Sedentary Time with Cardio-Autonomic Regulation in Women. J Womens Health (Larchmt) 2021; 31:600-608. [PMID: 34648723 DOI: 10.1089/jwh.2021.0243] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Background: Low moderate-to-vigorous-intensity physical activity (MVPA) and high sedentary time (ST) may contribute to cardiovascular disease (CVD) risk in women, perhaps via cardiac autonomic dysregulation. We examined associations of total, leisure, and occupational MVPA and ST with cardiac autonomic regulation in women. Methods: Data were from 522 women (age = 37.7 ± 5.7 years; 59%white) who participated in the follow-up study of the Pregnancy Outcomes and Community Health Study (between 2011 and 2014). MVPA and ST (hours/day) were self-reported using the Modifiable Activity Questionnaire. Cardiac autonomic regulation was assessed by calculating heart rate variability (HRV) indices (resting heart rate, natural logarithm standard deviation of normal R-R intervals; lnSDNN [total variability], natural logarithm root mean square of the successive differences; lnRMSSD [cardiac parasympathetic activity]) with Kubios software from a 5-minute, seated electrocardiogram. Progressive generalized linear models evaluated associations of total, leisure, and occupational MVPA and ST with HRV indices while adjusting for confounders (demographics, health-related factors), and then potential mediators (clinical variables). A final model evaluated the relationship between ST and HRV stratified by MVPA level. Results: Adjusting for confounders, total and leisure MVPA were associated with favorable lnSDNN (B = 0.027 [p = 0.014] and B = 0.074 [p = 0.009], respectively) and lnRMSSD (B = 0.036 [p = 0.015] and B = 0.075 [p = 0.043], respectively). Adjustment for mediators tended to strengthen the observed significant associations. No associations were found between occupational MVPA or any ST measure with HRV indices (p > 0.05). Neither MVPA nor ST were associated with heart rate. When stratified by MVPA level, leisure ST was associated with unfavorable lnRMSSD (B = -0.041, [p = 0.042]) only among women who did not meet leisure MVPA recommendations. Conclusion: Cardiac autonomic dysregulation may be a mechanism through which low leisure MVPA and, among low-active women, high leisure ST contribute to CVD risk among women.
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Affiliation(s)
- Abdullah Bandar Alansare
- Department of Exercise Physiology, College of Sport Sciences and Physical Activity, King Saud University, Riyadh, Saudi Arabia
| | - Bethany Barone Gibbs
- Department of Health and Human Development, School of Education, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Janet M Catov
- Department of Obstetrics, Gynecology, and Reproductive Sciences and University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - J Richard Jennings
- Department of Psychiatry, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Christopher E Kline
- Department of Health and Human Development, School of Education, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Elizabeth Nagle
- Department of Health and Human Development, School of Education, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Claudia Holzman
- Department of Epidemiology and Biostatistics, Michigan State University, East Lansing, Michigan, USA
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Alansare AB, Bates LC, Stoner L, Kline CE, Nagle E, Jennings JR, Hanson ED, Faghy MA, Gibbs BB. Associations of Sedentary Time with Heart Rate and Heart Rate Variability in Adults: A Systematic Review and Meta-Analysis of Observational Studies. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:ijerph18168508. [PMID: 34444256 PMCID: PMC8391190 DOI: 10.3390/ijerph18168508] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Revised: 08/07/2021] [Accepted: 08/09/2021] [Indexed: 01/18/2023]
Abstract
PURPOSE To evaluate if sedentary time (ST) is associated with heart rate (HR) and variability (HRV) in adults. METHODS We systematically searched PubMed and Google Scholar through June 2020. Inclusion criteria were observational design, humans, adults, English language, ST as the exposure, resting HR/HRV as the outcome, and (meta-analysis only) availability of the quantitative association with variability. After qualitative synthesis, meta-analysis used inverse variance heterogeneity models to estimate pooled associations. RESULTS Thirteen and eight articles met the criteria for the systematic review and meta-analysis, respectively. All studies were cross-sectional and few used gold standard ST or HRV assessment methodology. The qualitative synthesis suggested no associations between ST and HR/HRV. The meta-analysis found a significant association between ST and HR (β = 0.24 bpm per hour ST; CI: 0.10, 0.37) that was stronger in males (β = 0.36 bpm per hour ST; CI: 0.19, 0.53). Pooled associations between ST and HRV indices were non-significant (p > 0.05). Substantial heterogeneity was detected. CONCLUSIONS The limited available evidence suggests an unfavorable but not clinically meaningful association between ST and HR, but no association with HRV. Future longitudinal studies assessing ST with thigh-based monitoring and HRV with electrocardiogram are needed.
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Affiliation(s)
- Abdullah Bandar Alansare
- Department of Exercise Physiology, College of Sport Sciences and Physical Activity, King Saud University, King Khalid Rd, Riyadh 80200, Saudi Arabia
- Correspondence: ; Tel.: +966-555061381; Fax: +966-11-806-3370
| | - Lauren C. Bates
- Department of Exercise and Sport Science, University of North Carolina, Chapel Hill, NC 27599, USA; (L.C.B.); (L.S.); (E.D.H.)
| | - Lee Stoner
- Department of Exercise and Sport Science, University of North Carolina, Chapel Hill, NC 27599, USA; (L.C.B.); (L.S.); (E.D.H.)
| | - Christopher E. Kline
- Department of Health and Human Development, School of Education, University of Pittsburgh, 140 Trees Hall, Pittsburgh, PA 15261, USA; (C.E.K.); (E.N.); (B.B.G.)
| | - Elizabeth Nagle
- Department of Health and Human Development, School of Education, University of Pittsburgh, 140 Trees Hall, Pittsburgh, PA 15261, USA; (C.E.K.); (E.N.); (B.B.G.)
| | - J. Richard Jennings
- Department of Psychiatry, University of Pittsburgh, Pittsburgh, PA 15219, USA;
| | - Erik D. Hanson
- Department of Exercise and Sport Science, University of North Carolina, Chapel Hill, NC 27599, USA; (L.C.B.); (L.S.); (E.D.H.)
| | - Mark A. Faghy
- Human Sciences Research Centre, University of Derby, Derby DE22 1GB, UK;
| | - Bethany Barone Gibbs
- Department of Health and Human Development, School of Education, University of Pittsburgh, 140 Trees Hall, Pittsburgh, PA 15261, USA; (C.E.K.); (E.N.); (B.B.G.)
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Rodrigues GD, Dal Lago P, da Silva Soares PP. Time-dependent effects of inspiratory muscle training and detraining on cardiac autonomic control in older women. Exp Gerontol 2021; 150:111357. [PMID: 33864832 DOI: 10.1016/j.exger.2021.111357] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 04/06/2021] [Accepted: 04/08/2021] [Indexed: 11/26/2022]
Abstract
Inspiratory muscle training improved maximal inspiratory pressure (MIP) and vagal-mediated heart rate variability (HRV) in older women. However, it is unknown what occurs if the training is discontinued (detraining protocol). The aim of this study was to investigate the IMT and detraining effects on resting HRV in older women. Twelve healthy older women (60-72 yrs) enrolled in home-based IMT at 50% MIP (IMT-group) or placebo at 5% MIP (Sham-group) protocol for 4 weeks using a mechanical pressure threshold loading device. The participants were not engaged in any other exercise protocol at that time. During IMT and Sham interventions, the inspiratory load was adjusted weekly by the actual MIP and resting heart rate variability (HRV) evaluated. After training cessation (4 weeks of detraining), participants returned to the lab for HRV and MIP recordings. Adherence to IMT was superior to 95%. IMT increased MIP (23 ± 8 cmH2O) and vagal-mediated HRV (normalized HF; 37 ± 8%), following by the reduction of sympatho-vagal balance (LF/HF), from the second week to the end of the protocol compared to sham-group. After detraining, IMT-group reduced MIP (-23 ± 8 cmH2O) and vagal-mediated HRV (normalized HF; -38 ± 14%) returning to baseline values. In conclusion, MIP and vagal-HRV improvements induced by IMT were reversed by four weeks of detraining.
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Affiliation(s)
- Gabriel Dias Rodrigues
- Department of Physiology and Pharmacology, Fluminense Federal University, Niterói, Brazil
| | - Pedro Dal Lago
- Department of Physical Therapy, Universidade Federal de Ciências da Saúde de Porto Alegre, Brazil
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Liu X, Xiang L, Tong G. Predictive values of heart rate variability, deceleration and acceleration capacity of heart rate in post-infarction patients with LVEF ≥35. Ann Noninvasive Electrocardiol 2020; 25:e12771. [PMID: 32633866 PMCID: PMC7679834 DOI: 10.1111/anec.12771] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Revised: 04/20/2020] [Accepted: 05/05/2020] [Indexed: 01/30/2023] Open
Abstract
Background and aims The aim was to investigate the predictive values of heart rate variability, deceleration, and acceleration capacity of heart rate in sudden cardiac death in postinfarction patients with left ventricular ejection fraction (LVEF) ≥ 35%. Methods We enrolled 138 acute myocardial infarction patients (MI) randomly in sinus rhythm with LVEF ≥ 35% after myocardial infarction. Data on heart rate variability, deceleration runs, deceleration, and acceleration capacity were obtained from 24h‐dynamic electrocardiogram recordings. Clinical characteristics, medications, and echocardiography data were noted. The endpoints were sudden cardiac arrhythmias (SCA), including malignant arrhythmias in the hospital and viewed sudden death out of the hospital. Relationships between autonomic parameters and endpoints were evaluated. Results During follow‐up for over 24 months in MI patients, 10 patients occurred sudden cardiac arrhythmias. Subjects with SCA showed lower levels of SDNN (p = .018), TP (p = .007), VLF (p < .001), DC (p < .001), and low‐risk DRs (p < .001) than those without SCA. A low SDNN level (HR: 8.888, p = .006), low VLF level (HR: 14.699, p = .016), low DC level (HR: 4.430, p = .045), and higher risk DRs (HR: 3.81, p = .040) were identified as independent risk factors of SCA for postinfarction patients with LVEF ≥ 35%. The area under the ROC curve (AUC) of SDNN, VLF, and DC for identification of SCA were, respectively, 0.724 (p = .019), 0.807 (p < .001), and 0.804 (p = .002). SDNN, VLF, and DC combined assessment area under the ROC curve were 0.828 (p < .001). Conclusion Decreased SDNN, VLF, DC, and abnormal DRs are independently associated with increased risks of sudden cardiac arrhythmias in post‐MI patients with LVEF ≥ 35%. Combined SDNN, VLF, and DC may help identify a high‐risk group of malignant arrhythmias in postinfarction patients.
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Affiliation(s)
- Xiang Liu
- Department of Cardiology, The Second Affiliated Hospital of Soochow University, Suzhou City, China
| | - Li Xiang
- Department of Cardiology, The Second Affiliated Hospital of Soochow University, Suzhou City, China
| | - Guangming Tong
- Department of Cardiology, The Second Affiliated Hospital of Soochow University, Suzhou City, China
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Feature of Heart Rate Variability and Metabolic Mechanism in Female College Students with Depression. BIOMED RESEARCH INTERNATIONAL 2020; 2020:5246350. [PMID: 32190670 PMCID: PMC7064846 DOI: 10.1155/2020/5246350] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 02/04/2020] [Accepted: 02/13/2020] [Indexed: 01/19/2023]
Abstract
Purpose To explore the effects of depression on cardiac autonomic nerve function and related metabolic pathways, the heart rate variability (HRV) and urinary differential metabolites were detected on the college students with depression. Methods 12 female freshmen with depression were filtered by the Beck Depression Inventory (BDI-II) and Self-rating Depression Scale (SDS). By wearing an HRV monitoring system, time domain indexes and frequency domain indexes were measured over 24 hours. Liquid chromatography–mass spectrometry (LC-MS) was used to detect their urinary differential metabolites. Differential metabolites were identified by principal component analysis (PCA) and orthogonal projections to latent structures discriminant analysis (OPLS-DA). The metabolic pathways related to these differential metabolites were analyzed by the MetPA database. Results Stress time was significantly increased, and recovery time was markedly decreased in the depression group compared with the control group (p < 0.001). Standard deviation of the normal-to-normal R interval (SDNN), root mean square of the beat-to-beat differences (RMSSD), high frequency (HF), and low frequency (LF) were decreased significantly (p < 0.001). Standard deviation of the normal-to-normal R interval (SDNN), root mean square of the beat-to-beat differences (RMSSD), high frequency (HF), and low frequency (LF) were decreased significantly ( Conclusion Some autonomic nervous system disruption, high stress, and poor fatigue recovery were confirmed in college students with depression. The metabolic mechanism involved the disruption of coenzyme Q biosynthesis, glycine-serine-threonine metabolism, tyrosine metabolism, pyrimidine metabolism, and steroid metabolism under daily stress.
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