Loading...
Sex and limb comparisons of neuromuscular function in the morning versus the evening
Augsburger G.R. Soloveva A. Carr J.C.
Augsburger G.R.
Soloveva A.
Carr J.C.
Citations
Altmetric:
Soloist
Composer
Publisher
Wiley
Date
2022
Additional date(s)
Abstract
The time-of-day influence on neuromuscular function is well-documented, but important details remain elusive. It is currently unknown whether males and females differ in their diurnal variation for optimal neuromuscular performance. The purpose of this study is to identify the time-of-day influence on neuromuscular function between sexes and determine whether these responses differ for the upper versus lower limbs. A group of males (n = 12) and females (n = 15) completed neuromuscular performance testing in the morning (07:00–09:00) and evening (17:00–19:00) on separate days in a randomized order. Maximal force, the normalized rate of force development, EMG, normalized EMG rise, and submaximal force steadiness were compared between morning and evening hours. The main findings show that maximal force was greater in the evening for the knee extensors (d = 0.570, p < 0.01) but not the elbow flexors (d = 0.212, p = 0.281), whereas maximal muscle excitation was greater in the evening for the biceps brachii (d = 0.348, p < 0.01) but not the vastus lateralis (d = 0.075, p = 0.526) with no influence of sex. However, force steadiness during knee extension was superior in the evening versus the morning for males (d = 0.734, p = 0.025) and compared to evening values for females (g = 1.19, p = 0.032). Overall, these findings show that time-of-day affects the knee extensors more than the elbow flexors and that diurnal variability between sexes appears to be task-dependent. © 2022 The Authors. Physiological Reports published by Wiley Periodicals LLC on behalf of The Physiological Society and the American Physiological Society.
Contents
Subject
diurnal
EMG
force steadiness
RER
RFD
sex differences
time of day
EMG
force steadiness
RER
RFD
sex differences
time of day
Subject(s)
Research Projects
Organizational Units
Journal Issue
Genre
Description
Format
Department
Kinesiology
Burnett School of Medicine
Burnett School of Medicine