The Claim

Ashwagandha root extract administered at 600 mg daily for eight weeks during resistance training significantly improves cardiorespiratory endurance, measured as VO2max, by approximately 9.5% in male participants and 7% in female participants compared to placebo, with an effect size of 1.034 and statistical significance of p<0.0001.

Source: Effects of Ashwagandha ( Withania somnifera) standardized root extract on physical endurance and VO 2max in healthy adults performing resistance training: An eight-week, prospective, randomized, double-blind, placebo-controlled study

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
61score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

Cause and effect
1 study reviewed
In plain English

Taking 600mg of ashwagandha root extract every day while doing weight training for 8 weeks makes your heart and lungs work better - men improved their endurance by about 9.5% and women by about 7%, compared to people who took a dummy pill instead.

See the scientific wording

Ashwagandha root extract (600mg/day) significantly improves cardiorespiratory endurance (VO2max) by approximately 9.5% in males and 7% in females following eight weeks of resistance training, with an effect size of 1.034 (p<0.0001) compared to placebo

What the research says

1 study

  1. Study: Effects of Ashwagandha ( Withania somnifera) standardized root extract on physical endurance and VO 2max in healthy adults performing resistance training: An eight-week, prospective, randomized, double-blind, placebo-controlled study

    This study tested exactly what the claim says - 600mg of Ashwagandha root extract daily for 8 weeks during resistance training. It found that the supplement significantly improved endurance (VO2max) in both men and women compared to placebo, with very strong statistical evidence (p<0.0001).

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

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