Protein Supplementation Does Not Enhance Recovery from Exercise-Induced Muscle Damage

Starkoff BE, Lenz EK, Mattern CO, Too D, Byrne HK. Protein Supplementation Does Not Enhance Recovery from Exercise-Induced Muscle Damage. JEPonline 2020;23(1):99-112. This study determined whether the ingestion of a supplement containing carbohydrate and protein (CHO-PRO) improved recovery from exer...

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Published in:Journal of exercise physiology online 2020-02, Vol.23 (1), p.99
Main Authors: Starkoff, Brooke E, Lenz, Elizabeth K, Mattern, Craig O, Too, Danny, Byrne, Heidi K
Format: Article
Language:English
Subjects:
Clinical trials
Comparative analysis
Consumption data
Creatine
Creatine kinase
Dietary supplements
Exercise
Myoglobin
Nutrition
Proteins
Time
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Summary:Starkoff BE, Lenz EK, Mattern CO, Too D, Byrne HK. Protein Supplementation Does Not Enhance Recovery from Exercise-Induced Muscle Damage. JEPonline 2020;23(1):99-112. This study determined whether the ingestion of a supplement containing carbohydrate and protein (CHO-PRO) improved recovery from exercise-induced muscle damage (EIMD) compared to an isocaloric carbohydrate (CHO) only control supplement, while controlling for diet. Twenty resistance-trained males (22.1 [+ or -] 3.9 yr, 176.0 [+ or -] 6.9 cm, 84.2 [+ or -] 17.6 kg) participated in a 10-day, double-blind, randomized trial. The subjects consumed a provided diet (61.0 [+ or -] 1.3% CHO, 26.3 [+ or -] 1.4% fat, 14.7 [+ or -] 0.8% protein) and daily supplement of 60 gm CHO or 40 g CHO + 20 gm protein for 8 days. On the 7th day, subjects completed an EIMD protocol. Creatine kinase and myoglobin were assessed prior to EIMD and at 12, 24, 48, and 72 hrs post exercise. Muscle soreness and lower body muscle force production were measured pre-EIMD and at 24, 48, and 72 hrs post-EIMD. Creatine kinase levels (U/L) were elevated at 12 (227.1 [+ or -] 18.5), 24 (216.1 [+ or -] 17), 48 (189.6 [+ or -] 18.3), and 72 (168.1 [+ or -] 18) hrs post-EIMD compared to baseline (121.4 [+ or -] 15.2). Myoglobin levels were elevated 12 hrs post-EIMD (60.4 [+ or -] 56.6 ng*[mL.sup.- (1])) compared to baseline (8.8 [+ or -] 6.3 ng*[mL.sup.- (1])). No significant differences in creatine kinase or myoglobin between CHO and CHO-PRO groups were found. Muscle soreness was increased at all time points post-EIMD, yet there were no significant differences between conditions. There were also no significant differences in lower body muscle performance between groups. Results indicate that CHO-PRO supplementation does not reduce muscle damage or soreness following EIMD compared to CHO supplementation. Key Words: EIMD, Nutrition, Post-Exercise Recovery, Recovery
ISSN:1097-9751
1097-9751