Cited by 34Muscle metabolism and nutritionExercise and Physiological ResponsesSports Performance and Training

The effect of branched-chain amino acid on muscle damage markers and performance following strenuous exercise: A systematic review and meta-analysis

Doma, Kenji, Singh, Utkarsh, Boullosa, Daniel, Connor, Jonathan Douglas·2021·Applied Physiology Nutrition and Metabolism

Abstract

This systematic review and meta-analysis determined whether the ergogenic effects of branched-chain amino acids (BCAA) ameliorated markers of muscle damage and performance following strenuous exercise. In total, 25 studies were included, consisting of 479 participants (age 24.3 ± 8.3 years, height 1.73 ± 0.06 m, body mass 70.8 ± 9.5 kg, females 26.3%). These studies were rated as fair to excellent following the PEDro scale. The outcome measures were compared between the BCAA and placebo conditions at 24 and 48 hours following muscle-damaging exercises, using standardised mean differences and associated p-values via forest plots. Our meta-analysis demonstrated significantly lower levels of indirect muscle damage markers (creatine kinase, lactate dehydrogenase and myoglobin) at 48 hours post-exercise (standardised mean difference [SMD] = −0.41; p < 0.05) for the BCAA than placebo conditions, whilst muscle soreness was significant at 24 hours post-exercise (SMD = −0.28 ≤ d ≤ −0.61; p < 0.05) and 48 hours post-exercise (SMD = −0.41 ≤ d≤ −0.92; p < 0.01). However, no significant differences were identified between the BCAA and placebo conditions for muscle performance at 24 or 48 hours post-exercise (SMD = 0.08 ≤ d ≤ 0.21; p > 0.05). Overall, BCAA reduced the level of muscle damage biomarkers and muscle soreness following muscle-damaging exercises. However, the potential benefits of BCAA for muscle performance recovery is questionable and warrants further investigation to determine the practicality of BCAA for ameliorating muscle damage symptoms in diverse populations. PROSPERO registration number: CRD42020191248. Novelty: BCAA reduces the level of creatine kinase and muscle soreness following strenuous exercise with a dose–response relationship. BCAA does not accelerate recovery for muscle performance.

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Authors
Doma, K., Singh, U., Boullosa, D., & Connor, J. D.
Affiliations
  • James Cook University (AU)
  • Sports Dynamix Private Limited, Chennai, Nadu, India.
  • Universidade Federal de Mato Grosso do Sul (BR)
Venue
Applied Physiology Nutrition and Metabolism
Published
2021-11
Volume
46
Issue
11
Pages
1303-1313
ISSN
  • 1715-5312 (ISSN-L)
  • 1715-5320
OpenAlex
W3202599262
Cited by
34
References
69
Citations by year
2026: 3 · 2025: 11 · 2024: 9 · 2023: 6 · 2022: 5
FWCI
0.63
Type
journal article
Language
en
Open access
closed
Locations
  • Applied Physiology, Nutrition, and Metabolism (publishedVersion)
  • PubMed (publishedVersion)
  • ResearchOnline - JCU (James Cook University) (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Muscle metabolism and nutrition
  • Health Sciences › Medicine › Rehabilitation › Exercise and Physiological Responses
  • Health Sciences › Medicine › Orthopedics and Sports Medicine › Sports Performance and Training
Keywords
branched-chain amino acids, muscle damage, creatine kinase, lactate dehydrogenase, myoglobin, delayed onset muscle soreness, post-exercise recovery, muscle performance, ergogenic aids, strenuous exercise
MeSH terms
Amino Acids, Branched-Chain, Creatine, Humans, L-Lactate Dehydrogenase, Myoglobin, Physical Endurance, Biomarkers, Dietary Supplements, Performance-Enhancing Substances, Myalgia

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