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Effect of whey protein supplementation during resistance training sessions on body mass and muscular strength: A meta-analysis

Abstract

This study evaluates the effect of whey protein (WP) supplementation with resistance training (RT) on body mass and muscular strength reported by randomized controlled trials (RCTs). Literature survey was conducted in electronic databases and study selection was based on précised eligibility criteria. Meta-analyses of mean differences (MD) in lean/fat mass or standardized MD (SMD) in muscular strength between WP supplementation during RT sessions (WP-RT) and placebo-RT groups were conducted along with sensitivity and subgroup analyses. Data were taken from 22 RCTs in which 837 participants attended 13.08 weeks [95% CI 10.47, 15.69] of RT. In comparison with placebo-RT group, WP-RT significantly improved lean mass (MD 0.46 kg [0.10, 0.81]; p=0.01), fat mass (MD −0.86 [−1.20, −0.51]; p˂0.00001) and muscular strength (SMD 0.34 [0.11, 0.58]; p=0.005) in younger (˂40 years) individuals only. Moreover, in comparison with placebo-RT group, WP-RT improved lean mass (0.38 [−0.03, 0.79]; p=0.07), fat mass (MD −0.75 [−1.09, −0.42]; p˂0.00001) and muscular strength (SMD 0.29 [0.07, 0.51]; p=0.01) only in healthy individuals but not in individuals with a pathological condition. WP-RT improves lean mass, fat mass and muscular only in healthy individuals under age 40.

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Publication details

The article was received on 27 Jan 2019, accepted on 16 Apr 2019 and first published on 16 Apr 2019


Article type: Paper
DOI: 10.1039/C9FO00182D
Citation: Food Funct., 2019, Accepted Manuscript

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    Effect of whey protein supplementation during resistance training sessions on body mass and muscular strength: A meta-analysis

    M. Li and F. Liu, Food Funct., 2019, Accepted Manuscript , DOI: 10.1039/C9FO00182D

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