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Impact of Polyphenol Supplementation on Acute and Chronic Response to Resistance Training.

Beyer, Kyle S. PhD; Stout, Jeffrey R. PhD; Fukuda, David H. PhD; Jajtner, Adam R. PhD; Townsend, Jeremy R. PhD; Church, David D. MS; Wang, Ran MS; Riffe, Joshua J. MS; Muddle, Tyler W.D. MS; Herrlinger, Kelli A. MS; Hoffman, Jay R. PhD
Journal of Strength & Conditioning Research: Post Acceptance: August 22, 2017
doi: 10.1519/JSC.0000000000002104
Original Research: PDF Only

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.

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