Ashwagandha for Performance and Energy
TL;DR
A 2021 Bayesian meta-analysis of human trials found that Ashwagandha supplementation improved muscle strength, muscle mass, cardiorespiratory fitness (VO₂ max), and recovery markers in healthy adults. A 2023 narrative review supports reduced exercise-induced fatigue and muscle damage. Evidence is promising but not as robust as the stress and sleep data. Evidence rating: ⭐⭐⭐ Promising to Strong.
Why Ashwagandha Matters for Performance & Energy
Chronic stress and elevated cortisol can impair recovery, increase fatigue, and hinder training adaptations. Ashwagandha’s adaptogenic effects — particularly its ability to lower cortisol and support recovery — may indirectly benefit physical performance and energy levels in people under high training or life stress. Direct ergogenic effects on strength and endurance are also being studied.
Key Benefits
- Improves muscle strength and muscle mass in resistance-trained individuals
- Enhances cardiorespiratory endurance (VO₂ max and time to exhaustion)
- Reduces exercise-induced muscle damage and perceived fatigue
- Supports faster recovery between training sessions
Key Studies
Bonilla, D.A. et al. (2021) — Systematic review and Bayesian meta-analysis of human trials. Ashwagandha supplementation was more effective than placebo for improving muscle strength, muscle mass, cardiorespiratory fitness (VO₂ max), and recovery in healthy adults. Journal of Functional Morphology and Kinesiology. https://doi.org/10.3390/jfmk6010020
Mikulska, P. et al. (2023) — Narrative review of current research. Ashwagandha showed benefits for strength, aerobic capacity, reduced exercise-induced muscle damage, and faster recovery in athletic populations. Pharmaceutics. https://doi.org/10.3390/pharmaceutics15041057
Expert View
While Dr. Peter Attia and Dr. Andrew Huberman primarily discuss Ashwagandha for stress reduction, cortisol management, and sleep quality, emerging performance data aligns with its role as an adaptogen that may help athletes and active individuals manage training stress and support recovery during periods of high load.
Practical Dosage for Performance & Energy
- Most common dose in performance studies: 300–600 mg per day
- Best taken in the evening or split (morning + evening) depending on training schedule and stress levels
- Effects on strength and recovery typically seen after 6–8 weeks of consistent use
- Many experts recommend cycling: 8–12 weeks on, followed by a 2–4 week break
Safety & Notes
Ashwagandha is generally well tolerated at 300–600 mg/day. Mild gastrointestinal upset can occur. Not recommended during pregnancy or for individuals with autoimmune conditions without medical supervision. Athletes subject to drug testing should use products from reputable suppliers with third-party testing. Always consult your healthcare provider before use.
This is not medical advice. BioHackNZ provides general information based on published research. Always consult your healthcare provider before starting any supplement regimen. Individual results vary.
Last updated: 21 May 2026 | BioHackNZ Research Team
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