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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

Intake Of Water-soluble Protein During An Interval Of Repeated Strenuous Exercises Can Improve Serum Myoglobin Levels


Board #200 May 28 2:00 PM - 3:30 PM

Sanbongi, Chiaki; Baba, Seigo; Ambe, Hisataka; Oyama, Takeshi; Suijo, Kenichi; Sakamoto, Yuki; Takahara, Katsura; Ishizaka, Mihoko; Kurihara, Kunihiko; Fujieda, Yoshiharu

Author Information
Medicine & Science in Sports & Exercise: May 2009 - Volume 41 - Issue 5 - p 304
doi: 10.1249/
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Many athletes consume protein both immediately after exercise and before sleeping to build up the body and to recover from strenuous exercise. Little is known about the effects of protein supplementation during exercise because protein can have a bitter taste. Recently, athletes have been consuming a sports drink containing good tasting and rapidly absorbed water-soluble protein, without evidence of any obvious benefit.

PURPOSE: To determine whether intake of water-soluble protein during exercise has a favorable effect on muscle damage, performance, and soreness.

METHODS: Japanese trained male athletes (n=7) performed two sessions of high intensity cycle ergometer exercise. In each session, subjects did five repetitions of 10 s of maximal intensity riding interrupted by 50 s of resting. Subjects consumed protein (14.1 g/400 mL) either during exercise or immediately after exercise. Blood lactic acid, serum myoglobin, CK, and LDH were measured pre- and post-exercise. Perceived muscle soreness and psychological mood change (Profile of Mood State: POMS) were investigated.

RESULTS: Serum myoglobin, CK, and LDH increased significantly 2 h after exercise. Intake of water-soluble protein during exercise (relative to protein intake after exercise) decreased myoglobin, CK, and LDH. POMS scores (fatigue, total scores) were also improved.

CONCLUSIONS: In contrast to supplementation after exercise, supplementation during exercise attenuated post-exercise muscle damage and fatigue. The results suggest that ingestion of protein during exercise may be important.

© 2009 American College of Sports Medicine