期刊
JOURNAL OF STRENGTH AND CONDITIONING RESEARCH
卷 25, 期 2, 页码 398-405出版社
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1519/JSC.0b013e3181bac43c
关键词
buffering action; epinephrine; norepinephrine; growth hormone
资金
- Japan Society for the Promotion of Science for Young Scientists
Goto, K, Maemura, H, Takamatsu, K, and Ishii, N. Hormonal responses to resistance exercise after ingestion of carnosine and anserine. J Strength Cond Res 25(2): 398-405, 2011-Intramuscular carnosine buffers protons (H+) in skeletal muscle. We examined the effects of supplementation with chicken breast meat extract (CBEX) containing carnosine and anserine on hormonal responses to resistance exercise. Twenty-two men were assigned to a CBEX drink group (CBEX containing total 2 g of carnosine and anserine) (n = 14) or a placebo drink group (n = 8). The subjects ingested the prescribed drink (100 mL) twice daily for 30 days without physical training. Before and after the supplementation period, the subjects completed 5 sets of bilateral knee extension exercises (with a 90-s rest between sets). The magnitude of the increase in exercise-induced free testosterone did not change significantly after supplementation in either group. The blood lactate response to exercise was attenuated after supplementation in both groups (p < 0.05). In the CBEX group, the plasma epinephrine and norepinephrine concentrations after exercise were significantly lower after supplementation (p < 0.05). The serum growth hormone response to exercise was also reduced in the CBEX group after supplementation (delta value: 5.4 +/- 1.9 ng/mL [pre] vs. 1.6 +/- 0.5 ng/mL [post], p = 0.05). No significant differences in exercise-induced strength reduction (fatigue index) were observed in the 2 groups after supplementation. These results suggest that short-term supplementation with CBEX attenuates the exercise-induced epinephrine, norepinephrine, and growth hormone responses.
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