Sauna after a workout: good or not? The facts (2026)

Hitting the sauna after a solid training session is a fixed ritual for many athletes, while others wonder whether it really does anything. Does it actually help your recovery, or is it mostly a nice moment to relax? In this article we summarise what happens physiologically, which benefits are well supported, when it is better to wait, and how long an optimal session lasts.

What happens in your body during a sauna visit

The moment you step into the sauna, your skin temperature shoots up and your core temperature slowly follows. Your heart beats faster, your blood vessels dilate and you start sweating to cool down. That reaction looks surprisingly similar to easy cardio: your heart rate can rise to 100 to 150 beats per minute.

A key player at the cellular level is the group of so-called heat shock proteins (HSPs). These proteins are activated by heat stress and help repair damaged proteins inside your cells. That is interesting after training, because strength work causes small amounts of damage to muscle tissue. Heat also improves blood flow, which supports the removal of waste products and the delivery of nutrients.

The Hartstichting (the Dutch Heart Foundation) also points out that regular sauna use can have effects on the heart comparable to moderate cardio training — provided you are healthy. Read more at the Hartstichting on sauna and the heart.

Benefits for recovery and health

Research over the past years has clarified the potential benefits of sauna after exercise. The main ones:

• Faster subjective recovery: many athletes report less muscle stiffness the next day.
• Better blood flow: heat triggers vasodilation, which can speed up recovery processes.
• Cardiometabolic training: the elevated heart rate and sweat response train your circulation.
• Relaxation and lower stress: cortisol drops during and after a sauna session.
• Sleep quality: a heat peak followed by cooling helps many people sleep more deeply.

Especially if you train intensively, relaxing between sessions can pay off. Curious how often intensive exercise is healthy? Read our article on how often to exercise per week.

Risks and when to skip the sauna

Sauna is not a good idea for everyone at any moment. A few things to watch out for:

• Dehydration: you lose 0.5 to 1 litre of fluid per session. After a hard workout you are already partly dehydrated.
• Blood pressure drop when standing up: heat dilates your vessels. Getting up quickly can cause dizziness.
• Heart strain: be cautious with heart and vascular disease, high blood pressure or arrhythmia.
• Pregnancy, fever, alcohol: all three are reasons to skip the sauna.
• Right after extreme training: let your heart rate drop below 100 first.

Are you exercising with elevated blood pressure or actively managing it? Also see exercise and blood pressure for the combination of training, recovery and cardiovascular health. If you have questions about your resting or recovery heart rate, resting heart rate of 40: when is it normal is a useful follow-up.

How many minutes is optimal

Most research uses sessions of 10 to 20 minutes at 70 to 90 °C in a traditional sauna. Below that the effect is small, above that the risks rise faster than the benefits. A practical post-workout routine:

1. Drink 300 to 500 ml of water first to offset fluid loss.
2. Wait 10 minutes so your heart rate drops below 100 and you stop sweating heavily.
3. Session of 10 to 15 minutes, leave when you feel uncomfortable.
4. Cool down under a lukewarm shower, not ice cold if you want a calm session.
5. Optional second round of 10 minutes with a 10 to 15 minute break in between.

After your visit, drink another 500 ml of water or a drink with some salt to replenish electrolytes. The Voedingscentrum on fluid intake gives practical guidelines.

Infrared versus traditional sauna

Many gyms now offer an infrared cabin alongside a traditional sauna. The key differences:

• Traditional sauna: 70 to 100 °C, low to high humidity, mainly heats the air around you.
• Infrared sauna: 40 to 60 °C, dry air, heats your body directly via radiation.

For post-workout recovery both work. The traditional sauna gives a stronger cardiovascular stimulus and a more pronounced HSP response. Infrared is milder, easier to tolerate if you cope poorly with heat, and gives a comparable feeling of relaxation. The RIVM collects information on heat and health that is also useful for estimating the load.

Many Dutch gyms have a wellness area with a sauna, steam room and sometimes an infrared cabin. If you want to search specifically, check gyms with sauna in your region.

Using the sauna as part of your training routine

The sauna is no replacement for a good foundation: enough sleep, enough protein, hydration and a sensible training programme do the heavy lifting. But as an extra recovery tool it fits well into a week with multiple intense sessions, or as a quiet moment on your rest day.

If you are working towards a specific goal like fat loss or getting lean, nutrition stays in the lead. For that, check calculate your calorie needs and the practical guide can you get lean after 40.

Conclusion

For most healthy athletes, sauna after exercise is a fine addition to recovery — provided you hydrate well and limit sessions to 10 to 20 minutes. The cardiovascular stimulus, improved circulation and activation of heat shock proteins make it more than just relaxation. If you have a heart condition, high blood pressure or are pregnant, talk to your doctor before stepping into the sauna.