Muscular activation level during maximal voluntary co-contraction.

<p>Muscular activation level (% EMG_MVE) during maximal voluntary co-contraction in bodybuilders (circle) and nonathletes (square). The % EMG_MVE values for both biceps brachii (bodybuilders: 66±14% vs. nonathletes: 46±13%) and triceps brachii muscles (74±16% vs. 57±9%) were significantly higher in bodybuilders than in nonathletes. Open and closed symbols indicate individual and mean values, respectively.