This study investigated the effect of a proprietary polyphenol-blend (PPB) on acute and chronic adaptations to resistance exercise. Forty untrained men were assigned to control, PPB, or placebo. Participants in PPB or placebo groups completed a 4-week supplementation period (Phase I), an acute high-volume exercise bout (Phase II), and a 6-week resistance training program (Phase III); while control only completed testing during Phase II. Blood draws were completed during Phases I and II. Maximal strength in squat, leg press, and leg extension were assessed before and after Phase III. The exercise protocol during Phase II consisted of squat, leg press, and leg extension exercises using 70% of the participant's strength. The resistance training program consisted of full-body exercises performed 3 days/week. Following Phase I, PPB (1.56+/-0.48mM) had greater total antioxidant capacity than placebo (1.00+/-0.90mM). Changes in strength from Phase III were similar between PPB and placebo. PPB supplementation may be an effective strategy to increase antioxidant capacity without limiting strength gains from training.
This is an open-access article distributed under the terms of the Creative Commons Attribution-Non Commercial-No Derivatives License 4.0 (CCBY-NC-ND), where it is permissible to download and share the work provided it is properly cited. The work cannot be changed in any way or used commercially without permission from the journal.
Copyright (C) 2017 by the National Strength & Conditioning Association.