et lutte contre la fatigue
Intake Of Water-soluble Protein During An Interval Of Repeated Strenuous Exercises Can Improve Serum Myoglobin
Levels
Chiaki Sanbongi1, Seigo Baba1, Hisataka Ambe2, Takeshi Oyama3, Kenichi Suijo4, Yuki Sakamoto2, Katsura Takahara2, Mihoko Ishizaka1, Kunihiko
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.
