Older adults experience age-related physiological changes that affect body weight and body composition. In general, nutrition and exercise have been identified as potent stimulators of protein synthesis in skeletal muscle. Milk proteins are excellent sources of all the essential amino acids and may represent an ideal protein source to promote muscle anabolism in older adults undergoing resistance training. However, several randomized control trials (RCTs) have yielded mixed results on the effects of milk proteins supplementation in combination with resistance training on body weight and composition. Therefore, this review article has been conducted.
Does supplementation of milk protein alone or in combination with resistance training, increase fat-free mass in older adults (age ≥ 60 years)?
This review article included 10 RCTs involving 574 participants (mean age range from 60 to 80.8 years).
There was no statistical evidence of publication bias among the studies.
Results and conclusions:
The investigators found overall, the combination of milk proteins supplementation and resistance training had no significant effect on fat mass [0.30, 95% CI = -0.25 to 0.86 kg] or body weight [1.02, 95% CI = -0.01 to 2.04 kg].
The investigators found, however, a positive effect of milk proteins supplementation paired with resistance training on fat-free mass [0.74, 95% CI = 0.30 to 1.17 kg].
The investigators found greater fat-free mass gains were observed in studies that included more than 55 participants [0.73, 95% CI = 0.30 to 1.16 kg] and in studies that enrolled participants with aging-related medical conditions [1.60, 95% CI = 0.92 to 2.28 kg].
The investigators concluded supplementation of milk protein, in combination with resistance training, is effective to elicit fat-free mass gain in older adults (age ≥ 60 years).
Effects of Milk Proteins Supplementation in Older Adults Undergoing Resistance Training: A Meta-Analysis of Randomized Control Trials by Hidayat K, Chen GC, […], Qin LQ.