Sex-independent and dependent effects of older age on cycle-to-cycle variability of muscle activation during gait

Older age is associated with higher stride time variability in female and male gait, which may have a neuromuscular origin. We sought to determine how older age and sex affect muscle activation variability during gait, and how these patterns relate to stride time variability. Ninety-three adults (51 females; aged 20–82 years) completed six gait trials at their self-selected speed. Cycle-to-cycle variabilities (CCVs) were calculated for stride...