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Accession number;03A0438027
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| Title;Effects of the Enhanced Physiological Tremor on Muscle Fatigue During Static Endurance Exercise |
| Author;
TAMAKI HIROYUKI
(National Inst. Fitness and Sports in Kanoya, JPN)
OGITA FUTOSHI
(National Inst. Fitness and Sports in Kanoya, JPN)
TAKEKURA HIROAKI
(National Inst. Fitness and Sports in Kanoya, JPN)
KURATA HIROSHI
(National Inst. Fitness and Sports in Kanoya, JPN)
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Journal Title;Descente Sports Science
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Journal Code:L0988A
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ISSN:0285-5739
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VOL.24;NO.;PAGE.38-43(2003)
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| Figure&Table&Reference;FIG.4, REF.13 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;We investigated the electromyographic (EMG) properties and circulatory response during, before and after the enhanced physiological tremor (EPT) events. Six healthy male subjects performed the prolonged static contractions in triceps surae muscles at an ankle joint angle of 120.DEG. at 20% of maximal voluntary contraction (MVC) as a fatigue test. The physiological tremor enhanced by prolonged static muscle contractions, which tremor cycle was 8-10Hz, disappeared after lasting for 10-20 sec. All subjects could continue to sustain the same workload after the EPT events. We observed 1) significant (p<0.05) decreases in the EMG activity of gastrocnemius muscles to the initial level of the fatigue test, and 2) significant (p<0.05) increases in leg blood flow and the vascular conductance after the EPT events compared to before EPT events appeared. Repetitive muscle contractions induced by the EPT events are seemed to contribute as a muscle pump function during the prolonged static muscle contractions. This suggests the functional significance of the EPT for the temporary reduction of muscle fatigue during endurance work. (author abst.) |
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