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D-37 Free Communication/Poster - Protein and Amino Acid Metabolism: MAY 28, 2009 1: 00 PM - 6: 00 PM ROOM: Hall 4F

Supplementing Water-soluble Protein Can Improve Repetitive High Intensity Anaerobic Performance With Suppressed Serum Myoglobin Elevation


Board #201 May 28 2:00 PM - 3:30 PM

Fujieda, Yoshiharu; Oyama, Taksehi; Ambe, Hisataka; Sannbongi, Chiaki; Baba, Seigo; Suijo, Kenichi; Sakamoto, Yuki; Takahara, Katsura; Hayashi, Soutaro; Ishizaka, Mihoko; Kurihara, Kunihiko

Author Information
Medicine & Science in Sports & Exercise: May 2009 - Volume 41 - Issue 5 - p 304
doi: 10.1249/01.MSS.0000355478.53786.2e
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Many studies have revealed the effects of supplementing protein on endurance exercise performances or attenuating muscle damage derived from resistance training, whereas the evidences of protein supplementation for strenuous intermittent exercise are still insufficient.

PURPOSE: To investigate the effects of a protein beverage on anaerobic performances and muscle damage through double-blind manner.

METHODS: Subjects consisted of 7 Japanese male collegiate athletes (age; 21.4 ± 0.5yrs, height; 176.9 ± 4.8cm, weight; 70.2 ± 5.8kg) underwent twice the same intermittent anaerobic exercise protocol on the different 2 days under supplementing either water-soluble protein of 14.1g or placebo in crossover research design. Both on the 1st and the 2nd day, all the participants accomplished repetitive high-intensity sprint exercises composed of 2 sessions, and consumed protein or placebo before and after the 1st session. Each session included 5 bouts of 10 sec. cycle pedaling with maximal efforts at the workload of 0.075 kp. per body weight and 50 sec. intervals. Measuring serum myoglobin, CK and LDH was done before and after exercise to evaluate muscle damage.

RESULTS: ANOVA revealed significant differences in both anaerobic powers and changing patterns of serum myoglobin level. In contrast to the condition of taking placebo, subjects demonstrated not only higher achievement of total power outputs (6856 ± 669 vs.6730 ± 693 watts, p<0.05) but also lower serum myoglobin concentrations at 2-hour (39.0 ± 10.8 vs.52.0 ± 16.3 ng/ml, p<0.05) and 3-hour (33.8 ± 8.9 vs.44.3 ± 14.3 ng/ml, p<0.05) after exercise under supplementing protein.

CONCLUSIONS: Supplementing water-soluble protein can improve repetitive highly-demanding anaerobic performance with suppressed serum myoglobin elevation.

© 2009 American College of Sports Medicine