The aim of the study is to investigate the acute and short-term effects of collagen peptides (Collagen Peptan) on muscle and connective tissue during an eccentric overload training period. Currently, all studies investigating the effects of post-exercise collagen supplementation did this in the absence of whey proteins, which are part of the standard recommendations for post-exercise recovery. The investigators will therefore investigate whether the combined intake of whey proteins and collagen peptides ensures a better recovery of exercise performance and whether it can prevent or reduce symptoms of muscle and tendon overload during a three-week eccentric overload training period (n = 22).
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Change in countermovement jump performance
Timeframe: Pretest - 48 hours after the first training session (day 3 of training intervention) - Posttest (day 22 of training intervention)
Change in maximal isometric knee-extension force of the right leg
Timeframe: Pretest - 48 hours after the first training session (day 3 of training intervention) - Posttest (day 22 of training intervention)
Change in anteroposterior thickness of the right patellar tendon
Timeframe: Pretest - 48 hours after the first training session (day 3 of training intervention) - Posttest (day 22 of training intervention)
Change in neovascularization of the right patellar tendon
Timeframe: Pretest - 48 hours after the first training session (day 3 of training intervention) - Posttest (day 22 of training intervention)