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
Exercise-induced muscle damage (EIMD) symptoms may be attenuated through dietary polyphenol consumption by reducing acute inflammation and oxidative stress, protein degradation, and soreness. However, it is unclear if long-term supplementation of a multi-ingredient resveratrol-based polyphenolic compound mitigates EIMD symptoms and facilitates performance recovery.
PURPOSE: To investigate the effects of a resveratrol-based polyphenolic supplement on indices of EIMD.
METHODS: Male and female subjects completed a muscle damaging exercise protocol consisting of eccentric-loaded resistance exercise (ECRE) followed by four weeks of resveratrol-polyphenol (RES) (n=10) or placebo (CTL) (n=12) supplementation. Perceived soreness, pain threshold and tolerance, range of motion, and muscular performance were measured before and 24 and 48 hours after ECRE.
RESULTS: CTL demonstrated increased resting soreness at 24 (p=0.02) and 48 hours (p=0.03) post-EIMD compared to baseline while RES reported increased soreness at 24 hours post EIMD and by 48 hours soreness level returned to baseline (p=0.0003). CTL and RES demonstrated increased soreness under muscular tension at 24 (p<0.0005) and 48 hours (p=0.01 and p=0.007, respectively) post-EIMD compared to baseline with no significant interaction. CTL exhibited decreased pain threshold from baseline to 24 hours post-EIMD (p=0.03). CTL also displayed decreased pain tolerance in the vastus intermedius from baseline to 24 hours post-EIMD (p=0.03) and the vastus lateralis from baseline to 24 (p=0.003) and 48 hours (p=0.003). There were no significant interactions for pain threshold or pain tolerance for any test site. In terms of lower-body power, CTL showed a significant decrease in mean (p=0.04) and peak power (p=0.04) from baseline to 24 hours post-EIMD. There were no significant changes from baseline to 48 hours post-EIMD for CTL. RES demonstrated no changes from baseline for power at any post-EIMD time point.
CONCLUSION: Multi-day supplementation of a resveratrol-based polyphenolic substance may support the attenuation of soreness and recovery of performance following EIMD, however its effects on skeletal muscle tissue healing and regeneration remains unknown.