Effects of Nutritional Supplementation with Milk Fat Globule Membrane on Physical and Muscle Function in Healthy Adults Aged 60 and Over with Semiweekly Light Exercise: A Randomized Double-Blind, Placebo-Controlled Pilot Trial

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This study aimed to demonstrate the beneficial effects of nutritional supplementation with dietary milk fat globule membrane (MFGM) on physical performance and skeletal muscle function in healthy adults aged 60 and over with semiweekly light exercise. The study was designed as a randomized double-blind controlled trial. Twenty-two Japanese participants (10 men, 12 women) aged 60-73 y were assigned to one of two groups (11 [5 men, 6 women] in each). One group received MFGM tablets (1 g MFGM/d), and the other received placebo tablets daily for 10 wk. Both groups participated in a twice-weekly light exercise program. Physical function tests and surface electromyography (EMG) were conducted at the baseline and after 5 and 10 wk. Chair stand time significantly shortened in both groups after 10 wk compared with that at the baseline. The average time shortened more considerably in the MFGM group than in the placebo group, although the change was not statistically significant. Both knee extension strength and the cross-sectional area of the quadriceps muscles significantly increased from baseline in the MFGM group but not in the placebo group. Surface EMG showed that muscle fiber conduction velocity increased significantly after 10 wk from the baseline only in the MFGM group. The increase from the baseline was significantly greater in the MFGM group than in the placebo group. Daily supplementation with MFGM increased motor unit action potential conduction and improved muscle strength and physical performance in healthy Japanese adults aged 60 y and over paired with semiweekly light exercise.

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