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ORIGINAL RESEARCH article

Front. Physiol.
Sec. Exercise Physiology
Volume 15 - 2024 | doi: 10.3389/fphys.2024.1472702
This article is part of the Research Topic New Perspectives and Insights on Heart Rate Variability in Exercise and Sports View all 5 articles

EFFECTS OF INDIVIDUALIZED RESISTANCE TRAINING PRESCRIPTION WITH HEART RATE VARIABILITY ON MUSCLE STRENGTH, MUSCLE SIZE AND FUNCTIONAL PERFORMANCE IN OLDER WOMEN

Provisionally accepted
Diego Bittencourt Diego Bittencourt 1Ramon Martins De Oliveira Ramon Martins De Oliveira 1Deivid Gomes da Silva Deivid Gomes da Silva 1João Guilherme Almeida Bergamasco João Guilherme Almeida Bergamasco 1Marcelo de Castro Cesar Marcelo de Castro Cesar 2Daniela Godoi Jacomassi Daniela Godoi Jacomassi 3Julio Benvenutti Bueno De Camargo Julio Benvenutti Bueno De Camargo 1J. Derek Kingsley J. Derek Kingsley 4Cleiton Augusto Libardi Cleiton Augusto Libardi 1*
  • 1 MUSCULAB - Laboratory of Neuromuscular Adaptations to Resistance Training, Department of Physical Education (DEFMH), Federal University of São Carlos (UFSCar)., São Carlos, São Paulo, Brazil
  • 2 Department of Medicine, Center for Biological and Health Sciences, Federal University of São Carlos, Sao Carlos, Brazil
  • 3 Federal University of São Carlos, São Carlos, São Paulo, Brazil
  • 4 Kent State University, Kent, Ohio, United States

The final, formatted version of the article will be published soon.

    This study aimed to investigate whether individualizing autonomic recovery periods between resistance training (RT) sessions (IND) using heart rate variability (HRV), measured by the root mean square of successive R-R interval differences (RMSSD), would lead to greater and more consistent improvements in muscle strength, muscle mass, and functional performance in older women compared to a fixed recovery protocol (FIX). Twenty-one older women (age 66.0 ± 5.0 years old) were randomized into two different protocols (IND: n=11; FIX: n=10) and completed 7 weeks of RT. Measurements of RMSSD were performed within a five-day period to establish baseline values. The RMSSD values determined whether participants were recovered from the previous session. The assessments included muscle cross-sectional area (CSA), one-repetition maximum (1RM), peak torque (PT), rate of force development (RFD), chair stand (CS), timed up and go (TUG), 6-minutes walking (6MW), and maximum gait speed (MGS). There were no significant (P>0.05) group vs. time interactions. There were significant main effects of time (P<0.05) for CSA, 1RM, PT, TUG, CS, 6MW, and MGS, while no significant changes were observed for RFD (P>0.05). In conclusion, IND does not seem to enhance responses in muscle mass, strength, and functional performance compared FIX in healthy older women.

    Keywords: Autonomic Nervous System, Elderly, functionality, muscle hypertrophy, Recovery

    Received: 29 Jul 2024; Accepted: 29 Nov 2024.

    Copyright: © 2024 Bittencourt, De Oliveira, da Silva, Almeida Bergamasco, Cesar, Godoi Jacomassi, De Camargo, Kingsley and Libardi. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: Cleiton Augusto Libardi, MUSCULAB - Laboratory of Neuromuscular Adaptations to Resistance Training, Department of Physical Education (DEFMH), Federal University of São Carlos (UFSCar)., São Carlos, São Paulo, Brazil

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