Sex-related differences in motor unit behavior are influenced by myosin heavy chain during high- but not moderate-intensity contractions.
Alex A OlmosAdam J SterczalaMandy E ParraHannah L DimmickJonathan D MillerJake A DeckertStephanie A SontagPhilip M GallagherAndrew C FryTrent J HerdaMichael A TrevinoPublished in: Acta physiologica (Oxford, England) (2023)
at 70% MVC were likely due to greater type I% MHC and smaller twitch forces of the higher threshold MUs for the females. Evidence is provided that muscle fiber composition may explain divergent MU behavior between sexes.