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The Effects of Beta-Hydroxy-Beta-Methylbutyrate Supplementation on Recovery Following Exercise-Induced Muscle Damage: A Systematic Review and Meta-Analysis Publisher Pubmed



Rahimi MH1 ; Mohammadi H2, 3 ; Eshaghi H1 ; Askari G3 ; Miraghajani M4, 5
Authors
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Authors Affiliations
  1. 1. Department of Cellular and Molecular Nutrition, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences, Tehran, Iran
  2. 2. Students' Research Committee, Isfahan University of Medical Sciences, Isfahan, Iran
  3. 3. Food Security Research Center, School of Nutrition and Food Science, Isfahan University of Medical Sciences, Isfahan, Iran
  4. 4. National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran
  5. 5. The Early Life Research Unit, Division of Child Health, Obstetrics and Gynaecology, University of Nottingham, Nottingham, United Kingdom

Source: Journal of the American College of Nutrition Published:2018


Abstract

Background: Growing evidence suggests beta-hydroxy-beta-methylbutyrate's (HMB) positive effects on recovery following exercise-induced muscle damage (EIMD). However, findings vary substantially across studies. Objective: A meta-analysis of randomized controlled trials was conducted to assess the effects of HMB supplementation on recovery following EIMD by assessing indirect markers of muscle damage, namely creatine kinase (CK) and lactate dehydrogenase (LDH) serum levels among healthy participants. Method: A comprehensive search was performed on electronic databases (Medline, Scopus, Cochrane Library, and Google Scholar) up to October 2017 for trials evaluating the effects of HMB on recovery following EIMD. Mean ± standard deviation of follow-up CK and LDH concentrations were extracted to calculate the effect size for meta-analysis. Results: A total of 324 participants for CK and 229 participants for LDH were found from the 10 and 8 studies, respectively. The results revealed a significant effect of HMB supplementation on CK (weighted mean difference [WMD] = −60.71 UL−1; 95% confidence interval [CI], −78.12 to −43.29; I2 = 4.1%; pheterogeneity = 0.40) and LDH reduction (WMD = −15.42 UL−1; 95% CI, −22.2 to −8.6; I2 = 0.0%; pheterogeneity = 0.53). In addition, a subgroup analysis based on study duration (< 6 weeks vs. ≥ 6 weeks) suggested that HMB effectiveness on EIMD was statistically significant in studies over 6 weeks (p < 0.001). Conclusions: The current evidence revealed a time-dependent effect of HMB in reducing LDH and CK serum levels among adults. HMB, therefore, may be seen as a priority muscle damage recovery agent in interventions. © 2018, © 2018 American College of Nutrition.
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