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Neuromuscular fatigue after short maximum cycling exercise

Blaž Jereb ; Faculty of Sport, University of Ljubljana, Slovenia
Vojko Strojnik ; Faculty of Sport, University of Ljubljana, Slovenia

Sažetak

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.

Ključne riječi

sport; neuromuscular fatigue; Wingate test; electrical stimulation

Hrčak ID:

226725

URI

https://hrcak.srce.hr/226725

Datum izdavanja:

28.10.2003.

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