Ashwagandha and sports performance: efficacy, safety and limits

Trials differ in extract, plant part, dose, duration, training status, sex and outcome. VO2max, time to exhaustion and race time are not interchangeable. A 2021 trial in 50 athletic adults used 300 mg of root extract twice daily for eight weeks; this is an interesting study protocol, not a universal prescription. Published sports protocols often used about 500–600 mg/day of root extract for 8–12 weeks, but dose analyses remain hypothesis-generating.

NCCIH reports that some preparations may be tolerated short term, up to about three months, while long-term safety is uncertain. Drowsiness, stomach upset, diarrhea and vomiting can occur; rare liver-injury cases have been reported. Ashwagandha may interact with diabetes, blood-pressure, immunosuppressant, sedative, anticonvulsant and thyroid medicines. Avoid it during pregnancy and breastfeeding, and seek professional advice with thyroid, liver, kidney or autoimmune disease, regular medication or planned surgery.

For a healthy adult, ashwagandha is a secondary, cautious experiment rather than a proven all-purpose ergogenic aid. Expectations should remain modest and safety should come first.

A favorable statistical result may still be too small to change a workout or race. Available studies are short and do not establish whether effects persist, fade or depend on a training phase. They also do not identify an optimal protocol for every sex, age, sport or training level. A change in perceived fatigue or sleep may indirectly support a program, but it does not prove faster muscle repair or lower injury risk. Separate intermediate markers, questionnaires and real performance outcomes. An individual test is not a collective promise: change one variable at a time and stop if unusual symptoms appear.