Ashwagandha Benefits for Athletes and Muscle Performance

In the world of high-performance sport and fitness, athletes are constantly searching for safe and natural ways to train harder, recover faster and improve muscle performance. This growing interest has sparked more conversations around ashwagandha benefits for athletes, especially among sports nutrition experts and dedicated gym-goers. Ashwagandha, an adaptogenic herb used for centuries in Ayurvedic wellness practices, is widely recognized for helping the body adapt to physical and mental stress. Also known as Withania somnifera, this herb has traditionally been associated with better sleep, improved resilience and overall vitality. Now, emerging research suggests that ashwagandha may also support strength, endurance and recovery — making it an intriguing supplement for those who train intensely.

What is Ashwagandha?

Ashwagandha is a small shrub native to India and North Africa. The Sanskrit name translates to “smell of the horse,” reflecting the belief that the herb confers strength and vigor. The root is the most commonly used part of the plant and contains bioactive compounds such as alkaloids, flavonoids, steroidal lactones (withanolides) and glycosides. In Ayurvedic medicine it has been used to balance the body’s energy systems, calm the nervous system and enhance resilience against stress.

Modern science describes ashwagandha as an adaptogen: an herb that supports the body’s stress‑response systems, particularly the hypothalamic–pituitary–adrenal (HPA) axis. Adaptogens help regulate cortisol levels and may promote homeostasis during physical or psychological stress. This stress‑modulating property is part of the reason athletes are looking at ashwagandha to support training and recovery.

Why Athletes Are Taking Notice

Exercise is a controlled form of stress. Intense training creates a cascade of metabolic, hormonal and inflammatory responses. While these responses help build strength and endurance, they also place demands on the body. Athletes who train frequently often experience elevated cortisol, muscle soreness, poor sleep and a weakened immune system. Adaptogens like ashwagandha can theoretically support the body’s stress response and recovery processes. But does the science back up these claims? Recent studies provide some encouraging data.

Evidence for Muscle Strength and Growth

A meta‑analysis of 12 clinical trials involving 615 adults found that ashwagandha supplementation (120 mg to 1,250 mg per day for 2–12 weeks) improved muscular strength and power. The improvements were measured through one‑repetition‑maximum tests in exercises such as bench press, squat and leg extension. In one study, participants taking ashwagandha increased their bench‑press strength by about 46 kg (compared to 26 kg in the placebo group) and leg‑extension strength by about 14.5 kg (vs. 9.8 kg for placebo). Alongside these strength gains, the ashwagandha group experienced greater increases in muscle size at the arms and chest and showed stabilized serum creatine‑kinase levels—an indicator of reduced exercise‑induced muscle damage.

Another trial where athletes consumed 600 mg of ashwagandha daily for eight weeks reported significant increases in muscle mass, leg‑press strength and bench‑press performance for both men and women compared with placebo. Participants also displayed greater gains in muscle girth around the chest, arm and thigh. These findings suggest that ashwagandha may enhance hypertrophy and strength adaptation when paired with resistance training.

Possible Mechanisms

Ashwagandha’s impact on strength and muscle growth is thought to involve several mechanisms:

• Hormonal balance: Supplementation has been associated with increased testosterone levels. Healthy testosterone levels are linked to improved muscle protein synthesis.
• Reduced cortisol: As an adaptogen, ashwagandha may lower cortisol during stress. Elevated cortisol can hinder muscle growth and increase catabolism. One review noted that the herb’s stress‑modulating effect may help maintain anabolic hormones.
• Antioxidant and anti‑inflammatory effects: Exercise generates reactive oxygen species that contribute to muscle damage. Ashwagandha contains withanolides with antioxidant properties that may reduce oxidative stress and inflammation, thereby supporting recovery.

While these mechanisms are plausible, it’s important to note that more high‑quality trials are needed to fully understand how the herb influences muscle physiology.

Boosting VO2_22​ Max and Endurance

Cardiorespiratory fitness, often measured as maximal oxygen uptake (VO2_22​ max), is crucial for endurance athletes. Multiple studies have shown that ashwagandha can enhance VO2_22​ max and power output:

• In a controlled trial, 40 healthy subjects were given 500 mg of ashwagandha or a placebo daily for eight weeks. The ashwagandha group demonstrated improvements in power, maximum velocity and VO2_22​ max. Participants who took both ashwagandha and Terminalia arjuna (an herb with cardiovascular benefits) experienced further enhancements in VO2_22​ max and blood‑pressure regulation.
• Another study divided 50 fit individuals into ashwagandha and placebo groups and assessed VO2_22​ max using a 20‑meter shuttle run test. After eight and twelve weeks, the ashwagandha group had significantly higher VO2_22​ max values and better scores on recovery questionnaires. This suggests that the supplement may improve cardiorespiratory endurance and perceived recovery.
• A meta‑analysis summarized that ashwagandha supplementation increased VO2_22​ max in both trained and untrained athletes. Improved oxygen uptake translates to better endurance performance, allowing athletes to sustain higher intensity efforts for longer periods.

Stress Reduction and Mental Recovery

Athletes not only deal with physical fatigue but also mental stress from competition, training schedules and balancing life outside of sport. Adaptogens like ashwagandha can support mental resilience.

A systematic review of randomized controlled trials found that ashwagandha supplementation significantly reduced anxiety scores compared with placebo. Effective doses ranged from 125 mg to 1,000 mg per day. Banner Health’s sports nutritionist notes that the herb modulates the hypothalamic–pituitary–adrenal axis and helps control cortisol, which may benefit issues like anxiety, depression, fertility problems and sleep.

Poor sleep compromises recovery and performance. Studies indicate that ashwagandha can improve sleep quality, making it easier to achieve restorative rest. Improved cognitive function has also been reported. Chronic supplementation enhanced memory, reaction time and executive function, while acute doses appeared to improve short‑term memory and attention. These mental benefits are particularly valuable during training camps and competitions when athletes need to stay focused and calm under pressure.

Body Composition and Metabolic Health

Maintaining a healthy body composition—low body fat and high lean mass—is important for performance. Preliminary research suggests that ashwagandha may support favorable body composition changes. A review of randomized controlled trials noted that the herb may enhance the reduction of fat mass and increase muscle mass during strength training. Positive effects on body composition might be mediated by improved sleep quality and regulation of cortisol and testosterone.

Ashwagandha also appears to benefit metabolic health. A systematic review showed that it can improve weight loss and lower blood glucose and hemoglobin A1c_{1c}1c​, suggesting a role in managing insulin resistance and diabetes. Additionally, studies reported reductions in total cholesterol and triglycerides. While most of this research is preliminary, it hints that ashwagandha may support weight management and cardiovascular health—both relevant for athletes seeking optimal body composition.

Reducing Muscle Soreness and Enhancing Recovery

Beyond building strength and endurance, effective recovery determines how quickly athletes can return to training. Evidence shows that ashwagandha may alleviate muscle soreness and improve perceptions of recovery:

• In the eight‑week resistance‑training study mentioned earlier, participants taking ashwagandha reported better total quality recovery scores and higher energy levels than those on placebo. They also had lower perceived fatigue and a more positive mood after training.
• A Stanford Lifestyle Medicine summary noted that ashwagandha holds the potential to reduce muscle soreness and improve athletic and mental recovery at a dose of 600 mg per day. The authors emphasized that the herb’s antioxidant properties and potential effects on testosterone and dehydroepiandrosterone (DHEA) may partly explain this recovery support.
• Another review highlighted that supplementation decreased muscle fatigue and improved perceived recovery scores. These effects are particularly useful for athletes who train multiple times per day or who face congested competition schedules.

Immune Support and Additional Benefits

Intense training can temporarily suppress the immune system, increasing susceptibility to illness. Ashwagandha’s immunomodulatory effects may help protect athletes. Banner Health mentions that the herb’s immune‑boosting properties may keep athletes on track with their training. Although research is limited, ashwagandha’s antioxidant and anti‑inflammatory actions could support immune defense by reducing oxidative stress.

Other potential benefits include improved fertility, enhanced sexual function and cognitive support. While these outcomes may not directly impact athletic performance, they contribute to overall well‑being and vitality.

Recommended Dosage and Usage

Research studies have used daily doses ranging from 120 mg to 1,250 mg of ashwagandha root extract over periods of two to twelve weeks. Many athletic performance studies have used 300 mg taken twice per day (total 600 mg) with meals. Higher doses (750–1,250 mg) have also been investigated in untrained individuals beginning resistance training.

Ashwagandha is available in capsules, tablets, powders and tinctures. Standardized extracts (containing 5 % withanolides) are commonly used in research. When choosing a supplement, look for products that specify the withanolide content and have third‑party testing for quality and purity.

Timing may vary depending on individual preference and product instructions. Many athletes split the dose, taking half with breakfast and half in the evening. Because the herb may cause drowsiness in some people, avoid taking it before driving or operating machinery.

Safety Considerations

Ashwagandha has a long history of safe use, but there are some considerations:

• General safety: Several clinical trials (300–600 mg daily for 8–12 weeks) reported no significant adverse effects on hematological or thyroid parameters. A systematic review of 30 trials found no serious adverse events; minor side effects such as somnolence, giddiness and stomach discomfort occurred at similar rates in placebo groups.
• Interactions: Ashwagandha may interact with thyroid medication, diabetes drugs and blood‑pressure drugs. Because it may enhance thyroid hormone levels or lower blood glucose and blood pressure, consult a healthcare provider before combining it with such medications.
• Pregnancy and breastfeeding: Experts recommend that pregnant or breastfeeding people avoid ashwagandha due to limited safety data.
• Liver function: Rare cases of liver injury have been reported with very high doses or contaminated products, though these are uncommon. Choose reputable brands and stick to recommended dosages.
• Side effects: Possible adverse effects include digestive upset, drowsiness and, less commonly, increased thyroid hormone levels, hallucinations or blurred vision. These effects are usually mild and transient.

Practical Tips for Athletes

1. Start with a moderate dose. Many athletes see benefits with 300 mg of a standardized extract taken twice per day (morning and evening). Begin with this amount for several weeks before considering adjustments.
2. Combine with training. Ashwagandha seems to be most effective when paired with a resistance‑training or endurance program. It’s not a substitute for a solid training plan but may augment adaptations.
3. Monitor progress. Keep track of changes in strength, endurance, recovery and well‑being. If you notice improved performance and reduced fatigue, ashwagandha may be a useful addition. If not, consult a healthcare professional.
4. Choose quality products. Look for supplements with clear withanolide standardization and third‑party testing. Avoid products with unverified proprietary blends.
5. Consult a professional. Always check with a doctor or dietitian—especially if you take medications or have health conditions. Athletes subject to doping rules should also verify that their supplement is certified by organizations like NSF Certified for Sport or Informed‑Sport.

Conclusion

Ashwagandha is more than a trendy herb—emerging research suggests that it can support athletes and active individuals by enhancing muscle strength, improving VO2_22​ max, promoting recovery and supporting mental resilience. Studies have shown increases in bench‑press and leg‑extension strength, improvements in VO2_22​ max and endurance, reductions in muscle fatigue and beneficial effects on sleep and stress. While the total body of evidence is still limited and more large‑scale trials are needed, the herb appears safe at commonly used doses (300–600 mg daily).

For athletes and gym enthusiasts seeking a natural edge, ashwagandha could be a valuable component of a comprehensive training and recovery plan. It should not replace balanced nutrition, rest and structured workouts, but it may help the body adapt to the demands of intense training and improve overall well‑being.

Frequently Asked Questions

1. How does ashwagandha improve athletic performance?
Research suggests that ashwagandha may increase muscle strength, enhance VO2_22​ max and promote recovery by modulating hormones, reducing cortisol and providing antioxidant support.

2. What is the recommended dose for athletes?
Studies commonly use 300 mg of standardized extract taken twice daily (600 mg total). Doses from 120 mg to 1,250 mg per day have been studied. Start with a moderate dose and consult your healthcare provider.

3. When is the best time to take ashwagandha?
Splitting the dose—taking one half with breakfast and the other in the evening—may improve absorption and reduce potential drowsiness. Avoid taking it before operating heavy machinery.

4. Is ashwagandha safe for athletes subject to drug testing?
Ashwagandha is a natural herb and not on the World Anti‑Doping Agency (WADA) prohibited list. However, some supplements may be contaminated. To minimize risk, choose products certified by organizations like NSF or Informed‑Sport and consult your team’s medical staff.

5. Can ashwagandha help with weight loss?
Preliminary research suggests that ashwagandha may support weight management by improving body composition and metabolic health. However, its effect is modest compared to proper nutrition and exercise.

6. Are there any side effects?
Most studies report minimal side effects. Some people may experience digestive upset, drowsiness or mild changes in thyroid function. Always follow recommended dosages and consult a healthcare provider if you have concerns.