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Dose-response effects of dietary protein on muscle protein synthesis during recovery from endurance exercise

The importance of protein not only for muscle mass build-up, but also for muscle resynthesis during recovery fromin endurance exercise, is now quite well known. But how much protein is actually needed, and at what dose does more protein no longer bring additional benefits? A new study has examined the dose-dependent effect of 0, 15, 30 and 45 g milk protein plus 45 g carbohydrates on muscle protein synthesis. For this purpose, young, trained endurance athletes were given the respective regeneration drink after a three hour cycling session.

Result: The muscle protein synthesis (determined on the basis of several amino acids) was maximally stimulated by the 30 g dose, which corresponds to approx. 0.5 g/kg of body weight in the examined athletes. The intake of 45 g did not produce a significant additional effect.

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Literature
Churchward-Venne TA et al. (2020): Dose-response Effects of Dietary Protein on Muscle Protein Synthesis During Recovery From Endurance Exercise in Young Men: A Double-Blind Randomized Trial. Am J Clin Nutr 2020 May 2. doi: 10.1093/ajcn/nqaa073.

Author: Remo Jutzeler
Head R&D SPONSER SPORT FOOD
Ing. Applied Food Sciences UAS
MAS Nutrition & Health ETHZ