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J Strength Cond Res. 2010 Mar 10. [Epub ahead of print]
Hormonal Responses to Resistance Exercise after Ingestion of Carnosine and Anserine.
Goto K, Maemura H, Takamatsu K, Ishii N.
1Faculty of Sport Sciences, Waseda University, Tokorozawa, Saitama, Japan; 2Faculty of Health and Sport Sciences, International Pacific University, Okayama, Okayama, Japan; 3R & D Center, Nippon Meat Packers, Inc., Tsukuba, Ibaraki, Japan; 4Faculty of Health and Sport Sciences, Ryutsu keizai University, Ryugasaki, Ibaraki, Japan; and 5Department of Life Sciences, Graduate School of Arts and Sciences, University of Tokyo, Komaba, Tokyo, Japan.
Goto, K, Maemura, H, Takamatsu, K, and Ishii, N. Hormonal responses to resistance exercise after ingestion of carnosine and anserine. J Strength Cond Res 24(x): 000-000, 2010-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.
Hormonal Responses to Resistance Exercise after Ingestion of Carnosine and Anserine.
Goto K, Maemura H, Takamatsu K, Ishii N.
1Faculty of Sport Sciences, Waseda University, Tokorozawa, Saitama, Japan; 2Faculty of Health and Sport Sciences, International Pacific University, Okayama, Okayama, Japan; 3R & D Center, Nippon Meat Packers, Inc., Tsukuba, Ibaraki, Japan; 4Faculty of Health and Sport Sciences, Ryutsu keizai University, Ryugasaki, Ibaraki, Japan; and 5Department of Life Sciences, Graduate School of Arts and Sciences, University of Tokyo, Komaba, Tokyo, Japan.
Goto, K, Maemura, H, Takamatsu, K, and Ishii, N. Hormonal responses to resistance exercise after ingestion of carnosine and anserine. J Strength Cond Res 24(x): 000-000, 2010-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.
