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Dietary Antioxidants-contained Foods Promote Skeletal Muscle Adaptation And Reduce Fatigue Induced By Resistance Training: 2911 Board #194 June 1 330 PM - 500 PM

Kawamura, Aki

Medicine & Science in Sports & Exercise: May 2018 - Volume 50 - Issue 5S - p 719
doi: 10.1249/01.mss.0000538371.32684.87
F-60 Free Communication/Poster - Ergogenic Aids IV - Food, Herbal Supplements and Performance Friday, June 1, 2018, 1:00 PM - 6:00 PM Room: CC-Hall B
Free

Kyoto prefectural university, Kyoto, Japan.

(No relevant relationships reported)

PURPOSE: To investigate the effects of antioxidants-contained foods on muscle adaptation and fatigue induced by resistance training. Here, we focused on three antioxidants which can promote protein synthesis.

METHODS: Twenty-six healthy men were divided into control (C) and antioxidant (A) groups. All subjects were performed a resistance training program twice a week for 10 weeks. Salmon flake, vegetable juice, and lingonberry jam which contain astaxanthin, β-carotene, and resveratrol, were provided for the A group. Body composition, nutritional intake, maximal voluntary contraction (MVC), oxygen consumption, subjective fatigue, and serum carbonylated protein were measured in pre- and post-intervention.

RESULTS: Lean body mass was significantly increased in both groups (p < 0.05). Intakes of astaxanthin, β-carotene, and resveratrol were significantly increased in the A group (p < 0.01). Although MVC (kg) of leg extension was significantly higher in post-intervention (C: 26.2 ± 1.7, A: 31.1 ± 2.1) than in pre-intervention (C: 24.2 ± 2.0, A: 25.3 ± 2.4) (C: p = 0.04, A: p= 0.005) in both groups, the degree of change was higher in the A group (C: 2.0 ± 0.8, A: 5.7 ± 1.5) (p = 0.065). Oxygen consumption (ml/kg/min) was significantly higher in post-intervention (3.6 ± 0.1) than in pre-intervention (3.4 ± 0.1) (p = 0.049) in the A group, but not changed in the C group. The degree of subjective fatigue was significantly lower in post-intervention (2.0 ± 0.4) than in pre-intervention (3.1 ± 0.6) (p = 0.028) in the A group, but not changed in the C group. In addition, serum carbonylated protein (nmol/mg) was significantly lower in post-exercise (0.12 ± 0.01) than in pre-exercise (0.15 ± 0.01) (p = 0.026) in post-intervention of the A group only.

CONCLUSIONS: Intakes of astaxanthin, β-carotene, and resveratrol may promote resistance training-induced muscle adaptation by reducing fatigue and oxidative stress, leading to higher muscle strength.

© 2018 American College of Sports Medicine