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Article

Continuous Protein Supplementation Reduces Acute Exercise-Induced Stress Markers in Athletes Performing Marathon

1
West-German Centre of Diabetes and Health, Düsseldorf Catholic Hospital Group, 40591 Dusseldorf, Germany
2
Public Health Nutrition Research Group, London Metropolitan University, London N7 8DB, UK
3
Faculty of Medicine, University of Freiburg, 79117 Freiburg, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Louise Deldicque
Nutrients 2021, 13(9), 2929; https://doi.org/10.3390/nu13092929
Received: 21 July 2021 / Revised: 16 August 2021 / Accepted: 18 August 2021 / Published: 24 August 2021
(This article belongs to the Special Issue Nutrients Supporting an Active Lifestyle)
The aim of this study was to determine the changes in endurance performance and metabolic, hormonal, and inflammatory markers induced by endurance stress (marathon race) in a combined strategy of training and dietary protein supplementation. The study was designed as a randomised controlled trial consisting of regular endurance training without and with a daily intake of a soy protein-based supplement over a three-month period in 2 × 15 (10 males and 5 females per group) endurance-trained adults. Body composition (body mass, BMI, and fat mass) was determined, and physical fitness was measured by treadmill ergometry at baseline and after 3 months of intervention; changes in exercise-induced stress and inflammatory markers (CK, myoglobin, interleukin-6, cortisol, and leukocytes) were also determined before and after a marathon competition; eating behaviour was documented before and after intervention by a three-day diet diary. Although no significant influence on endurance performance was observed, the protein supplementation regime reduced the exercise-induced muscle stress response. Furthermore, a protein intake of ≥20% of total energy intake led to a lower-level stress reaction after the marathon race. In conclusion, supplementary protein intake may influence exercise-induced muscle stress reactions by changing cellular metabolism and inflammatory pathways. View Full-Text
Keywords: protein-rich diet; endurance exercise; muscle stress; inflammation protein-rich diet; endurance exercise; muscle stress; inflammation
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MDPI and ACS Style

Röhling, M.; McCarthy, D.; Berg, A. Continuous Protein Supplementation Reduces Acute Exercise-Induced Stress Markers in Athletes Performing Marathon. Nutrients 2021, 13, 2929. https://doi.org/10.3390/nu13092929

AMA Style

Röhling M, McCarthy D, Berg A. Continuous Protein Supplementation Reduces Acute Exercise-Induced Stress Markers in Athletes Performing Marathon. Nutrients. 2021; 13(9):2929. https://doi.org/10.3390/nu13092929

Chicago/Turabian Style

Röhling, Martin, David McCarthy, and Aloys Berg. 2021. "Continuous Protein Supplementation Reduces Acute Exercise-Induced Stress Markers in Athletes Performing Marathon" Nutrients 13, no. 9: 2929. https://doi.org/10.3390/nu13092929

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