Hilkens Luuk, De Bock Jolien, Kretzers Joris, Kardinaal Alwine F M, Floris-Vollenbroek Esther G, Scholtens Petra A M J, Horstman Astrid M H, van Loon Luc J C, van Dijk Jan-Willem
Institute of Sports and Exercise Studies, HAN University of Applied Sciences , Nijmegen, The Netherlands.
NIZO Food Research , Ede, The Netherlands.
J Sports Sci. 2021 Feb;39(3):322-331. doi: 10.1080/02640414.2020.1820184. Epub 2020 Oct 5.
The current double blind, randomized, placebo-controlled trial with two parallel groups aimed to assess the impact of whey protein supplementation on recovery of muscle function and muscle soreness following eccentric exercise. During a 9-day period, forty recreationally active males received twice daily supplementation with either whey protein (PRO; 60 g/day) or an iso-energetic amount of carbohydrate (CON). Muscle function and soreness were assessed before, and 0, 3, 24, 48, and 72 h after performing 100 drop jumps. Recovery of isometric maximal voluntary contraction (MVC) did not significantly differ between groups (timextreatment, = 0.56). In contrast, the recovery of isokinetic MVC at 90°·s was faster in CON as opposed to PRO (timextreatment interaction, = 0.044). Recovery of isokinetic MVC at 180°·s was also faster in CON as opposed to PRO (timextreatment interaction, = 0.011). Recovery of countermovement jump performance did not differ between groups (timextreatment interaction, = 0.52). Muscle soreness, CK and CRP showed a transient increase over time ( < 0.001), with no differences between groups. In conclusion, whey protein supplementation does not accelerate recovery of muscle function or attenuate muscle soreness and inflammation during 3 days of recovery from a single bout of eccentric exercise.
本次双盲、随机、安慰剂对照的平行组试验旨在评估补充乳清蛋白对离心运动后肌肉功能恢复和肌肉酸痛的影响。在9天的时间里，40名有运动习惯的男性每天接受两次补充，分别是乳清蛋白（PRO组；60克/天）或等量热量的碳水化合物（CON组）。在进行100次纵跳前以及纵跳后0、3、24、48和72小时评估肌肉功能和酸痛情况。等长最大自主收缩（MVC）的恢复在两组之间无显著差异（时间×处理，P = 0.56）。相比之下，CON组在90°/秒时的等速MVC恢复速度比PRO组快（时间×处理交互作用，P = 0.044）。CON组在180°/秒时的等速MVC恢复速度也比PRO组快（时间×处理交互作用，P = 0.011）。反向纵跳表现的恢复在两组之间无差异（时间×处理交互作用，P = 0.52）。肌肉酸痛、肌酸激酶（CK）和C反应蛋白（CRP）随时间呈短暂升高（P < 0.001），两组之间无差异。总之，在单次离心运动后3天的恢复过程中，补充乳清蛋白并不能加速肌肉功能的恢复，也不能减轻肌肉酸痛和炎症。
