Witmer, C. A., Blackledge, G., Davis, S. E., Sauers, E. J., & Moir, G. L. (2014). The effect of 7 days of quercetin supplementation on repeated-sprint ability. Medicine & Science in Sports & Exercise, 46(5), Supplement abstract number 935.

This study determined the effect of seven days of quercetin supplementation on mean fatigue, average mean power output, mean peak-power output, and mean oxygen uptake during a repeated-sprint cycling protocol (10 x 6-second sprints interspersed with 30 seconds of recovery) in active, college-aged males (N = 15). Ss performed 10 x 6-second sprints interspersed with 30 seconds of passive recovery on an electromagnetically-braked cycle ergometer with a standardized resistance of 0.70 Nm/kg. Two familiarization trials were experienced and then the pre-supplement baseline trial was performed. Each session was separated by a minimum of 48 hours. Ss were randomly assigned to either a placebo group or quercetin supplement group after being matched for fatigue scores from the baseline trial. Ss then underwent seven days of supplementation with either quercetin (1 g/day) or placebo. At the conclusion of supplementation, Ss again performed the repeated-sprint protocol.

There were no significant differences for mean fatigue, average mean power output, mean peak-power output, or mean oxygen uptake.

Implication. Seven days of quercetin supplementation did not improve repeated sprint ability or mean oxygen uptake.

Return to Table of Contents for this issue.