Exercise Physiology Research Group, Department of Movement Sciences, KU Leuven, Leuven, Belgium.
Department of Physical and Rehabilitation Medicine, University Hospitals Leuven, Leuven, Belgium.
Int J Sport Nutr Exerc Metab. 2023 Oct 31;34(2):69-78. doi: 10.1123/ijsnem.2023-0070. Print 2024 Mar 1.
Previous studies showed that collagen peptide supplementation along with resistance exercise enhance muscular recovery and function. Yet, the efficacy of collagen peptide supplementation in addition to standard nutritional practices in athletes remains unclear. Therefore, the objective of the study was to compare the effects of combined collagen peptide (20 g) and whey protein (25 g) supplementation with a similar daily protein dose (45 g) of whey protein alone on indices of muscle damage and recovery of muscular performance during eccentric exercise training. Young fit males participated in a 3-week training period involving unilateral eccentric exercises for the knee extensors. According to a double-blind, randomized, parallel-group design, before and after training, they received either whey protein (n = 11) or whey protein + collagen peptides (n = 11). Forty-eight hours after the first training session, maximal voluntary isometric and dynamic contraction of the knee extensors were transiently impaired by ∼10% (Ptime < .001) in whey protein and whey protein + collagen peptides, while creatine kinase levels were doubled in both groups (Ptime < .01). Furthermore, the training intervention improved countermovement jump performance and maximal voluntary dynamic contraction by respectively 8% and 10% (Ptime < .01) and increased serum procollagen type 1N-terminal peptide concentration by 10% (Ptime < .01). However, no differences were found for any of the outcomes between whey and whey protein + collagen peptides. In conclusion, substituting a portion of whey protein for collagen peptide, within a similar total protein dose, improved neither indices of eccentric muscle damage nor functional outcomes during eccentric training.
先前的研究表明，在抗阻运动的基础上补充胶原蛋白肽可以增强肌肉恢复和功能。然而，在运动员中，除了标准营养实践之外，补充胶原蛋白肽的效果仍不清楚。因此，本研究的目的是比较联合补充胶原蛋白肽（20g）和乳清蛋白（25g）与单独补充乳清蛋白（45g）相似的每日蛋白剂量对离心运动训练期间肌肉损伤和肌肉性能恢复的影响。年轻健康的男性参与了为期 3 周的训练期，包括单侧离心伸膝运动。根据双盲、随机、平行组设计，在训练前后，他们分别接受了乳清蛋白（n=11）或乳清蛋白+胶原蛋白肽（n=11）。第一次训练后 48 小时，乳清蛋白和乳清蛋白+胶原蛋白肽组的最大自主等长和动态伸膝收缩均暂时降低了约 10%（Ptime<.001），而两组的肌酸激酶水平均增加了一倍（Ptime<.01）。此外，训练干预分别提高了反向跳跃性能和最大自主动态收缩能力 8%和 10%（Ptime<.01），并增加了 10%的血清前胶原 1N 端肽浓度（Ptime<.01）。然而，在乳清蛋白和乳清蛋白+胶原蛋白肽组之间，对于任何结果都没有发现差异。综上所述，在相似的总蛋白剂量内，用胶原蛋白肽替代一部分乳清蛋白，既不能改善离心肌肉损伤的指标，也不能改善离心训练期间的功能结果。
