Electrophysiological responses before and after the two stimulation protocols.

Mmax: maximal M wave at rest, Msup: maximal M wave elicited during MVC, Hmax: maximal H-reflex at rest, Hsup: maximal H reflex elicited during MVC, MEP: motor evoked potential elicited during MVC, silent: silent period accompanying MEP during MVC. MIstim and HIstim: M wave and H-reflex obtained during twitch evoked at the stimulation intensity. P<0.05, P<0.01 significantly different from pre- values. Values are presented as mean ± SD (pooled data).