Repeated Bout Effect Was More Expressed in Young Adult Males Than in Elderly Males and Boys
Figure 3
Voluntary (MVC (a) maximal voluntary contraction force of quadriceps muscle; H of DJs (f) height of drop jumps; VA (e) quadriceps muscle voluntary activation index) and electrically (P20 (b) and P100 (c) muscle contraction force evoked by stimulating quadriceps muscle at 20 Hz and 100 Hz frequencies, resp.; P20/P100 (d) ratio of P20/P100 indicates the level of low frequency fatigue) induced muscle performance 48 h (percent from before) after bout 1 and bout 2 in boys (), young adult males (), and elderly males () (mean ± SD). *,** and , compared with before; #, compared with bout 1.