Fig. 1.

Maximal knee extensor torque and peak EMG activity.

Group mean ± standard deviation for (A) Maximal quadriceps knee extension torque (N^.m), (B) maximal quadriceps knee extension torque relative to bodyweight (N^.m^.kg⁻¹); and (C) peak electromyography (EMG) activity (uV) achieved during a 90^o isometric knee extensor contraction for young (white bars) and old (grey bars) adults. * Indicate significant (P < 0.05) differences between groups. MVC, Maximal voluntary contraction; KET, Knee-extension torque; BM, Body mass.