Sex Differences on Autonomic Modulation in Response to Weight Machines
Author(s)
  • Isabella Banyai Senior, Exercise Science (Pre-Physical/Occupational Therapy/Podiatric Medicine)
Abstract
It has been suggested that an acute bout of resistance exercise reduces vagal modulation for at least 30 minutes. PURPOSE: We sought to evaluate how autonomic modulation during recovery from an acute bout of resistance exercise differs between the sexes. METHODS: Forty-six volunteers (men: 25; women: 21) underwent an acute bout of resistance exercise consisting of 3 sets of 10 reps at 75% of 1-repetition maximum on the chest press, latissimus dorsi pulldown, leg press, leg curl and leg extension, and a Control. Heart rate variability (HRV) was assessed at Rest, 15-20 minutes (Rec1), and 25-30 minutes (Rec2) during recovery. Vagal modulation was assessed using HRV and included logarithmically (ln) transformed high-frequency power (lnHF), as well as the root mean square of successive differences (lnRMSSD). Sympathovagal balance was assessed using low frequency/high frequency ratio (lnLF/HF ratio). Two-way repeated measures ANOVAs were used to evaluate differences between sexes across time. RESULTS: There were no two-way interactions (sex by time) of vagal modulation or sympathovagal balance. There was a significant main effect of time for lnHF such that both recovery time points were higher compared to Rest. There were also significant main effects of time for lnRMSSD, and lnLF/HF ratio such that Rest was significantly lower than Rec1 and Rec2. CONCLUSIONS: These data suggest that an acute bout of weight machine exercise results in the same vagal modulation and sympathovagal balance between men and women. Keywords: parasympathetic, vagal, resistance exercise
Format
Conference Proceeding
Contributor(s)
Faculty Mentor
J. Derek Kingsley
Modified Abstract

We sought to evaluate differences in autonomic modulation during recovery from an acute bout of resistance exercise between the sexes. Heart rate variability (HRV) was assessed at Rest, 15-20 minutes, and 25-30 minutes during recovery. Vagal modulation was assessed using HRV and included logarithmically (ln) transformed high-frequency power (lnHF), as well as the root mean square of successive differences (lnRMSSD). Sympathovagal balance was assessed using low frequency/high frequency ratio (lnLF/HF ratio). There were no two-way interactions (sex by time) for vagal modulation or sympathovagal balance. There were significant main effects of time for lnHF, lnRMSSD, and lnLF/HF ratio. These data suggest that an acute bout of weight machine exercise results in the same depression of vagal modulation and increase in sympathovagal balance between the sexes.
Permalink https://oaks.kent.edu/ugresearch/2020/exercise-science/sex-differences-autonomic-modulation-response-weight-machines
Banyai, I. Sex Differences on Autonomic Modulation in Response to Weight Machines. https://oaks.kent.edu/node/10335
Banyai, Isabella. n.d. “Sex Differences on Autonomic Modulation in Response to Weight Machines”. https://oaks.kent.edu/node/10335.
Banyai, I. Sex Differences on Autonomic Modulation in Response to Weight Machines. https://oaks.kent.edu/node/10335.