Enhanced sarcoplasmic reticulum Ca2+ release following intermittent sprint training

1 Institute of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense University, 5230 Odense M; 3 Institute of Clinical Research, Odense University Hospital, 5230 Odense M; 4 Copenhagen Muscle Research Centre, Rigshospitalet, DK-2200 Copenhagen N, Denmark; and 2 Institute for Experimental Medical Research, Ullevaal Hospital, 0407 Oslo, Norway To evaluate the effect of intermittent sprint training on sarcoplasmic reticulum (SR) function, nine young men performed a 5 wk high-intensity intermittent bicycle training, and six served as controls. SR function was evaluated from resting vastus lateralis muscle biopsies, before and after the training period. Intermittent sprint performance (ten 8-s all-out periods alternating with 32-s recovery) was enhanced 12% ( P