If you train hard, whether that’s lifting weights, running, or competing in a college sport at MSU, the day after a hard session can be brutal. Delayed onset muscle soreness, or DOMS, is the price most athletes pay for pushing their limits. A growing number of trainers, physical therapists, and athletes are turning to sauna sessions as part of their recovery routine, and the research behind it is more substantial than you might expect.
What Happens to Your Muscles After Intense Exercise
When you train hard, microscopic damage occurs in muscle fibers, triggering an inflammatory response that leads to soreness, stiffness, and temporarily reduced strength output. Your body needs time, nutrients, and the right recovery signals to repair that tissue and come back stronger. This is where heat exposure appears to play a meaningful role.
The Research Behind Sauna and Muscle Recovery
A study published through the National Institutes of Health’s PubMed Central database examined the effects of a post-exercise infrared sauna session on neuromuscular performance and muscle soreness following resistance training. Researchers found that heat exposure after training supported faster recovery of neuromuscular function and reduced subjective muscle soreness compared to passive recovery alone. You can review the full study on PMC (NIH).
A separate review published by the Nova Southeastern University International Journal of Allied Health Sciences and Practice found that sauna use, particularly infrared exposure following resistance training, is associated with reduced muscle soreness and improved neuromuscular performance. The review also pointed to hormonal responses, including changes in growth hormone and testosterone, that may support tissue repair and reduced inflammation after heat exposure.
At the cellular level, heat exposure triggers the production of heat shock proteins, which act as molecular chaperones that help guide the proper folding of muscle proteins during the repair process. This mechanism is one reason researchers believe consistent sauna use may support better long-term recovery outcomes for athletes who train frequently.
Sauna and Cortisol: What Athletes Should Know
Cortisol plays a complicated role in recovery. Some elevation after training is a normal part of the body’s adaptive stress response, but chronically high cortisol can interfere with recovery and sleep. A study on female team-sport athletes examining post-exercise infrared sauna use found that cortisol responses shifted and adapted favorably over a six-week training intervention, suggesting the body adjusts positively to regular post-workout heat exposure over time. Read more about this research on PMC (NIH).
Sauna vs. Ice Bath for Recovery
Athletes have debated hot versus cold recovery methods for years, and the honest answer is that both have a place. Cold water immersion is well-supported for reducing acute inflammation and soreness immediately after intense exercise. Sauna use, on the other hand, appears to offer benefits over a slightly longer window, supporting circulation, relaxation, and the hormonal environment needed for tissue repair. Some athletes combine both methods in a contrast therapy protocol. If you want to go deeper on that approach, check out our companion guide on cold plunge and sauna contrast therapy.
Best Practices for Recovery-Focused Sauna Sessions
Timing matters. Most research protocols use sauna sessions of 15 to 30 minutes, either immediately after training or later the same day. Traditional wood-fired saunas in the 150°F to 195°F range and infrared saunas in the 120°F to 150°F range have both shown recovery benefits, though the mechanisms differ slightly. Staying hydrated is essential, since heat exposure combined with post-exercise fluid loss can add up quickly.
A simple approach for most athletes:
- Finish your workout and rehydrate before entering the sauna.
- Spend 15 to 20 minutes in the heat, focusing on slow breathing.
- Cool down gradually rather than jumping straight into cold temperatures.
- Rehydrate again and prioritize protein intake within the following hour.
- Repeat two to four times per week for consistent results.
Why Mankato Athletes Are Renting Mobile Saunas
Minnesota State University athletes, local gym members, and weekend warriors across Mankato are increasingly building sauna sessions into their training weeks. Unlike a fixed sauna facility, a mobile rental from Stoked Saunas can be delivered directly to your home, apartment complex, or training facility, making consistent post-workout recovery far easier to maintain, especially during a long Minnesota training season.
If stress and soreness from student life or athletics are wearing you down, our guide on sauna rentals for student stress relief in Mankato covers additional ways local students are using heat therapy to stay on top of both academics and training.
A Note on Safety
Heat exposure immediately after very intense strength training can, in some cases, blunt certain anabolic signaling pathways involved in muscle growth, according to research published in the Journal of Physiology. Athletes focused primarily on hypertrophy may want to separate heavy lifting sessions and sauna use by a few hours, while those focused on general recovery and soreness reduction can use sauna sessions more immediately after training. As always, listen to your body and consult a physician if you have any underlying health conditions.
Book a Recovery-Focused Sauna Session in Mankato
Stoked Saunas offers wood-fired mobile sauna rentals delivered throughout Mankato, MN, giving athletes and active adults an easy way to build heat therapy into a consistent recovery routine. Browse our rental packages or book your session today to start recovering the way serious athletes do.