Weekly vagal modulations and their associations with physical fitness and physical activity

Medeiros, Andra R., Leicht, Anthony S., Michael, Scott, and Boullosa, Daniel (2021) Weekly vagal modulations and their associations with physical fitness and physical activity. European Journal of Sport Science. (In Press)

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Abstract

The root mean square of successive differences (RMSSD) of R-R intervals, the most robust vagal modulation parameter of heart rate variability (HRV), has been proposed as a marker of global health and training adaptations. The weekly averaging of RMSSD and its natural logarithm (LnRMSSD) has been adopted to enhance detection of training-induced adaptations. We assessed measures of aerobic fitness, body composition, objective physical activity (PA), and daily LnRMSSD recordings during different conditions, such as supine rest, seated rest, standing and walking at 5 km/h, over a week in 34 healthy young individuals of both sexes (age: 22 +/- 4 yr; body fatness: 20 +/- 8%; estimated VO(2)max: 40 +/- 8 mL center dot kg(-1)center dot min(-1)). The day-to-day reliability and agreement among LnRMSSD averages over 5, 4, 3, 2 and a single-day value per condition were assessed, while correlations between LnRMSSD, aerobic fitness, body composition, and PA were also examined. Poor to good day-to-day reliability, and moderate to excellent agreement were observed for LnRMSSD recordings for diverse conditions with a minimum of two daily recordings in the supine condition, and three in the other conditions achieving excellent agreement for weekly HRV assessment. Several correlations between LnRMSSD, aerobic fitness, body composition, and PA were revealed, with stronger observed associations during walking. Utilisation of weekly HRV (average of 2-3 daily recordings), as described in the current study, may provide practitioners with a tool to assess weekly vagal modulations for health and performance purposes. Walking HRV recordings may be a practical alternative to other conditions for the investigation of cardiac autonomic function.

Item ID: 66044
Item Type: Article (Research - C1)
ISSN: 1536-7290
Keywords: Heart rate, parasympathetic modulations, autonomic control of HR, heart rate variability, performance, health
Copyright Information: © 2020 European College of Sport Science
Funders: Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Projects and Grants: CNPq grant 311243/2018-5
Date Deposited: 30 Dec 2020 07:30
FoR Codes: 42 HEALTH SCIENCES > 4207 Sports science and exercise > 420702 Exercise physiology @ 100%
SEO Codes: 20 HEALTH > 2099 Other health > 209999 Other health not elsewhere classified @ 100%
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