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F-34 Free Communication/Poster - Protein/Amino Acid Supplementation: JUNE 4, 2010 1: 00 PM - 6: 00 PM: ROOM: Hall C

Supplementing Water Soluble Protein Through Intensive Training Camp Can Attenuate Injuries And Anemia In Runners


Board #205 June 4 3:30 PM - 5:00 PM

Takahara, Katsura; Ambe, Hisataka; Fujieda, Yoshiharu

Author Information
Medicine & Science in Sports & Exercise: May 2010 - Volume 42 - Issue 5 - p 774
doi: 10.1249/01.MSS.0000386242.94827.07
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BACKGROUND: It has been reported that supplementing proteins can expand single bout of exercise performances and/or prevent muscle damage, whereas effects of protein supplementation through consecutive days are unknown.

PURPOSE: The purpose of this study was to investigate the effects of supplementing water soluble protein on physical conditions of runners during intensive summer training sessions.

METHODS: Seventeen Japanese collegiate middle and long-distance runners volunteered to participate in this study. Nine of the participants (APG; 6 males and 3 females) were instructed to ingest a beverage with water soluble protein of 28.2 g/day, while the others (PLG: 6 males and 2 females) took a placebo during 7-day summer intensive training camp. Supplementing water soluble protein or placebo was completed at the timing of 30 min. prior to and after each morning and afternoon demanding exercise session, which contained 400 m sprints of 50 times as an example, through the camp. Subjective conditions of muscle soreness and fatigue assessed by visual analog scale and objective blood chemical analysis were performed at the baseline and after accomplishing the camp.

RESULTS: Under the similarly attained exercise stress which did not differ statistically between the groups, 2 males and 1 female of PLG had to retire from leg injuries, while only 1 male runner of APG did not complete the camp due to ankle injury. Subjective leg fatigue expressed by area under curve in APG was higher than that in PLG (29.6 ± 2.3 vs. 25.3 ± 4.6, p<0.05). With respect to muscle conditions, no significant difference was observed in both subjective soreness and objective serum CK, LDH and myoglobin levels between APG and PLG. As to hematological findings of anemia, hemoglobin (13.4 ± 1.1 vs. 12.3 ± 1.6 g/dl, p<0.05), hematocrit (42.2 ± 2.9 vs. 38.5 ± 4.3%, p<0.05) and serum iron (89 ± 28 vs. 57 ± 25 μg/d, p<0.05) levels in PLG decreased significantly after completing 7-day program, compared with baseline values. Caloric intakes and nutritional balance except for water soluble protein of supplementations during camp made no difference between the groups.

CONCLUSIONS: Supplementing water soluble protein through intensive training of consecutive 7 days can attenuate the incidence of injuries and prevent runners from exercise-induced anemia.

© 2010 American College of Sports Medicine