Supplements

Ashwagandha & Cortisol: Optimizing Stress for Peak Performance

By Ciro Simone Irmici · Published Mar 9, 2026 · Updated Mar 9, 2026

Dive into the science of ashwagandha and cortisol. Learn how managing your body's stress response can boost recovery, performance, and overall well-being.

In the demanding world of fitness, stress isn't just mental; it's a physiological response that directly impacts your recovery, performance, and overall health. Understanding and managing key biomarkers like cortisol, and exploring the role of adaptogenic supplements like ashwagandha, is crucial for any athlete looking to train smarter, not just harder.

A new focus on the Cortisol Awakening Response (CAR) in the context of ashwagandha research highlights the scientific community's commitment to unraveling the precise mechanisms by which natural compounds can support our bodies in navigating daily stressors.

The Bottom Line

• The Cortisol Awakening Response (CAR) is a vital biomarker for assessing the body's acute stress response and overall resilience.
• Ashwagandha, an adaptogenic herb, is being rigorously studied for its potential to modulate stress, including its effects on CAR.
• Scientific discussions are emphasizing the importance of robust research methodologies and standardized extracts (like Shoden) to ensure efficacy and reliability in supplement use.
• Experts like Dr. Jessie Cavanaugh (Harvard Medical School) are driving deeper insights into cortisol science and ashwagandha's physiological impact.
• Properly researched and standardized adaptogens offer a promising avenue for athletes to support recovery and stress management.

What the Science Says

The latest discussions in sports science are shining a spotlight on the body's stress response, particularly the Cortisol Awakening Response (CAR). CAR is the sharp increase in cortisol levels that occurs shortly after waking, serving as a key indicator of how our body gears up to face the day's demands. While a healthy CAR is natural and necessary for alertness and cognitive function, an overactive or dysregulated response can point to chronic stress, impacting everything from sleep quality to immune function and recovery capacity.

Against this backdrop, adaptogenic herbs like ashwagandha (Withania somnifera) are gaining significant scientific attention. Adaptogens are unique compounds that help the body adapt to various stressors, promoting balance and resilience. A specific focus is on highly standardized extracts, such as Shoden, for which new research into its impact on CAR is underway. This research, involving experts like Dr. Jessie Cavanaugh from Harvard Medical School and Keely Johnson from Arjuna Natural, delves into both cortisol science and the precise methodology required to understand ashwagandha's true effects. The emphasis is on moving beyond anecdotal evidence to rigorous, evidence-based conclusions.

This ongoing research aims to clarify how ashwagandha interacts with the body's stress pathways, potentially helping to normalize cortisol levels and improve the body's ability to cope with physical and mental demands. By focusing on detailed research methodology, the scientific community ensures that any claims made about ashwagandha's benefits are backed by solid, reproducible data, providing athletes with trustworthy information on how to optimize their physiological response to stress.

How to Apply This to Your Training

For an everyday athlete, managing stress isn't just about feeling good; it's about optimizing physiological processes crucial for muscle growth, recovery, and peak performance. Elevated or poorly managed cortisol levels can impair muscle protein synthesis, increase fat storage, reduce immune function, and negatively impact sleep – all factors that directly hinder your progress in the gym and beyond. Understanding the science behind cortisol and adaptogens provides you with tools to proactively address these challenges.

While the full results of studies on specific ashwagandha extracts like Shoden are still emerging, the scientific focus on CAR and robust research methodology underscores the importance of choosing high-quality, standardized supplements. If you're experiencing chronic stress, poor sleep, or struggling with recovery despite adequate training and nutrition, incorporating a scientifically-backed adaptogen like ashwagandha, after consulting with a healthcare professional, could be a valuable addition to your regimen. Look for products that specify the concentration of active compounds (withanolides) and reference clinical studies.

However, it's critical to remember that supplements are just one piece of the puzzle. An adaptogen can support your body's stress response, but it's not a magic bullet. It works best when combined with foundational stress management strategies. This approach empowers you to leverage cutting-edge research to enhance your physical and mental resilience, ensuring your body can adapt and thrive under the demands of your training.

Action Steps

• Track Your Stressors: Keep a journal for one week to note perceived stress levels, sleep quality, and energy. This self-awareness is the first step to intervention.
• Prioritize Foundational Recovery: Ensure you're getting 7-9 hours of quality sleep nightly, maintaining a balanced diet, and incorporating active recovery or mindfulness practices (e.g., stretching, meditation).
• Research Standardized Extracts: If considering ashwagandha, seek out brands that use clinically studied, standardized extracts (e.g., Shoden, KSM-66) with clear dosage instructions.
• Consult a Professional: Before adding any new supplement, especially if you have existing health conditions or are on medication, discuss it with a doctor or registered dietitian.
• Monitor and Adjust: If you do introduce ashwagandha, track your subjective feelings (energy, sleep, mood) and objective metrics (recovery, performance) to assess its impact over 4-8 weeks.
• Optimize Your Training Load: Ensure your training program includes adequate deload weeks and periodization to prevent overtraining, which is a significant physiological stressor.

Common Questions

Q: What is cortisol, and why does it matter for athletes?

A: Cortisol is a primary stress hormone released by your adrenal glands. While essential for alertness and metabolism, chronically high levels due to training or life stress can impair recovery, reduce muscle gain, increase fat storage, and negatively affect sleep and immune function.

Q: How does ashwagandha work to manage stress?

A: Ashwagandha is an adaptogen, meaning it helps the body adapt to various forms of stress. It's believed to modulate the hypothalamic-pituitary-adrenal (HPA) axis, which controls the stress response, potentially leading to a more balanced cortisol profile and improved resilience to physical and mental stressors.

Q: Is all ashwagandha the same, or should I look for specific types?

A: Not all ashwagandha products are created equal. Efficacy can vary widely depending on the plant's origin, extraction methods, and standardization of active compounds (withanolides). Look for reputable brands using clinically studied, standardized extracts like Shoden or KSM-66, which guarantee a consistent and effective dose of beneficial compounds.

Sources

Based on content from ScienceDaily Supplements.