tailieunhanh - Báo cáo y học: " Whey protein isolate attenuates strength decline after eccentrically-induced muscle damage in healthy individuals"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Whey protein isolate attenuates strength decline after eccentrically-induced muscle damage in healthy individuals | Cooke et al. Journal of the International Society of Sports Nutrition 2010 7 30 http content 7 1 30 jissn journal of the onal society of sports nutrition RESEARCH ARTICLE Open Access Whey protein isolate attenuates strength decline after eccentrically-induced muscle damage in healthy individuals A A 1 . r I D r . r . I - 1 21 c .-v .-v D T I t 1 1 r I c Ct- Cl- - iÍc 11DtI I I V I 1 1 A I T I_I T c 1 1 Matthew B Cooke Emma KybalKa Christos G Stathis Paul J Cribb Alan Hayes Abstract Background We examined the effects of short-term consumption of whey protein isolate on muscle proteins and force recovery after eccentrically-induced muscle damage in healthy individuals. Methods Seventeen untrained male participants 23 5 yr 180 6 cm 80 11 Kg were randomly separated into two supplement groups i whey protein isolate WPH n 9 or ii carbohydrate CHO n 8 . Participants consumed g day supplement 30 g consumed immediately and then once with breakfast lunch in the afternoon and after the evening meal for a period of 14 days following a unilateral eccentric contraction-based resistance exercise session consisting of 4 sets of 10 repetitions at 120 of maximum voluntary contraction on the leg press leg extension and leg flexion exercise machine. Plasma creatine Kinase and lactate dehydrogenase LDH levels were assessed as blood marKers of muscle damage. Muscle strength was examined by voluntary isoKinetic Knee extension using a Cybex dynamometer. Data were analyzed using repeated measures ANOVA with an alpha of . Results Isometric Knee extension strength was significantly higher following WPH supplementation 3 P and 7 P days into recovery from exercise-induced muscle damage compared to CHO supplementation. In addition strong tendencies for higher isoKinetic forces extension and flexion were observed during the recovery period following WPH supplementation with Knee extension strength being significantly greater P after 7 days recovery. .

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