摘要：Neuromuscular fatigue during and after short maximally intensive concentric exercise was analyzed. Nine healthy sport students performed the 15s Wingate test. Maximal cycling power decreased by 1.86 W × kg-1 (p<0.001) during the cycling. After the exercise, a significant increase in the blood lactate concentration was found (1.13 mM × l-1) before the exercise and 6.7 mM × l-1 seven minutes after the exercise (p<0.05). Electrical stimulation of the vastus lateralis muscle resulted in a decreased twitch maximum force by 30 % (p<0.001). Contraction time and half relaxation timewere shorter, but not significantly (p<0.05). Torque at 20 Hz stimulation decreased by 20 % (p<0.003), while torque at 100 Hz stimulation was lowered by 10 % (p<0.000). The results after the 15s maximally intensive cycling pointed to high and low frequency fatigue, however, it seems that low frequency fatigue prevailed.
