期刊
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY
卷 105, 期 3, 页码 357-363出版社
SPRINGER
DOI: 10.1007/s00421-008-0911-7
关键词
Nutritional supplements; Neuromuscular fatigue; Muscle buffering capacity; Training
资金
- FSI Nutrition, 2132 South 156th Circle, Omaha, NE
- RunFast Promotions, 8790 Wendy Lane South, West Palm Beach FL [33411]
The purpose of this study was to determine the effects of beta-alanine supplementation and high-intensity interval training (HIIT) on electromyographic fatigue threshold (EMG(FT)) and efficiency of electrical activity (EEA). A total of 46 men completed four, 2-min work bouts on a cycle ergometer. Using bipolar surface electrodes, the EMG amplitude was averaged and plotted over the 2-min. The resulting slopes were used to calculate EMG(FT) and EEA. Following initial testing, all participants were randomly assigned to either placebo (PL; n = 18), beta-alanine (BA; n = 18) or control groups (CON; n = 10). Following randomization, participants engaged in 6 weeks of HIIT training. Significant improvements in EMG(FT) and EEA resulted for both training groups. In conclusion, HIIT appeared to be the primary stimulus effecting EMG(FT) or EEA, suggesting adaptations from HIIT may be more influential than increasing skeletal muscle carnosine levels on delaying fatigue in recreationally active men.
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