The purpose of this study is to examine the effect of compression to the calf muscle on 1) plantar flexion force evoked by electrical stimulations involved single or repetitive stimulations (20 Hz), 2) jump performance, and 3) muscle fatigue during intermittent isometric contractions at a submaximal load. The results showed that 1) twitch force decreased by compression whereas plantar flexion force during electrical stimulations at 20 Hz with compression at 150mmHg was significantlyhigher compared with that without compression, 2) the jump height and rebound jump index during rebound jump with compression tended to be higher compared with thatwithout compression, and 3) the slope of electromyographic activities with contractionrepetitions at constant load with compression was higher compared with that without compression. These results indicate that ballistic muscle contractions would be improved by compression at relatively higher intensity.

DESCENTE SPORTS SCIENCE Vol.36/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE