Motor unit firing rate variability

Limb dominance is associated with motor unit firing rate variability in humans.

“Force steadiness and MUFR variability revealed distinct Leg x AgeGroup interactions: older adults had greater variability in non-dominant legs, while younger adults showed the opposite.”

HumansNon-dominant versus dominant legs; direction differed by age groupvastus lateralis

Task Complexity and Limb Dominance Modulate the Effects of Ageing on Neuromuscular Function

bioRxiv (Cold Spring Harbor Laboratory)·4 Sep 2025Preprint