Les protéines pendant l'entrainement augmentent les performances

Supplementing Water-soluble Protein Can Improve Repetitive High Intensity Anaerobic Performance With Suppressed
Serum Myoglobin Elevation
Yoshiharu Fujieda1, Taksehi Oyama2, Hisataka Ambe1, Chiaki Sannbongi3, Seigo Baba3, Kenichi Suijo4, Yuki Sakamoto1, Katsura Takahara1, Soutaro

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.

Source: http://www.nutrimuscle.com/forum/viewtopic.php?t=1298