Effects of 6 weeks of quercetin supplementation on energy, fatigue, and sleep in ROTC cadets.

Purpose: To investigate the effects of 6 weeks of quercetin supplementation on energy, fatigue, and sleep quality in young persons conducting military physical training.

Methods: Using a randomized, double-blind, repeated-measures, placebo-controlled design, 58 healthy, moderately trained men and women were assigned to quercetin group and placebo group. Energy, fatigue, and sleep quality were evaluated before, in the middle, at the end, and 2 weeks following 42 to 54 days of supplementation with 1 g/day of quercetin in a soft chew or a placebo.

Results: Changes in energy and fatigue, assessed by the Profile of Mood States-Brief and the Mental and Physical State Energy and Fatigue Scales, and changes in sleep quality, measured by the Pittsburgh Sleep Quality Index were not significantly different (p > 0.05) in quercetin and placebo groups.

Conclusion: Six weeks of quercetin supplementation in young persons conducting military physical training does not influence energy, fatigue, or sleep quality.