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Evidence-Based Supplement Research
Evidence-Based Supplement Research
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Rhodiola and Reduced Perceived Exertion

Research synthesisLow evidenceSmall effect3 studies · 1 beneficial · 2 neutral · 0 harmful

Across 3 studies, 1 reported a beneficial small effect of Rhodiola supplementation on reducing perceived exertion, while 2 found neutral effects. The beneficial effect was observed in male volleyball athletes over 28 days, but the evidence is limited and mixed. The median study duration was 16 days, and no consistent dose or form emerged across studies.

  • Studied populations: athletes

Caveats: Evidence base is small (only 3 studies) — conclusions should be considered preliminary. Many of the included studies did not reach statistical significance — effect may be smaller than the predominant direction suggests. The single beneficial study combined Rhodiola with caffeine, making it difficult to isolate the effect of Rhodiola alone.

Generated Jul 13, 2026
Time to effect
Median: 2.3 weeks · IQR 10 days–3.1 weeks · Range 4 days–4 weeks — Reported in 2 of 3 studies
3 of 3 papers
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