For most people, using an infrared sauna after a workout is the more practical choice. Heat before training may leave you warm and relaxed, but it can also increase fluid loss and fatigue before the exercise has begun. Post-workout use allows the training session to remain the priority and is the timing studied in some infrared-sauna recovery research.
That does not mean a sauna automatically improves recovery or that everybody should add one after exercise. The type of workout, session length, hydration, heat tolerance and health circumstances all matter.
Why is after the workout usually preferred?
Exercise already increases body temperature, cardiovascular demand and fluid loss. Adding prolonged heat before a demanding workout can mean starting the session more dehydrated or less comfortable than necessary.
After training, the sauna can function as a deliberate transition into rest. Many people value the warmth, quiet and unhurried ritual even when they are not chasing a measurable performance effect.
What does infrared-sauna recovery research show?
A small study of trained participants investigated a single post-exercise infrared-sauna session after resistance and endurance training. The researchers reported some improvement in recovery measures, including aspects of neuromuscular performance and perceived muscle soreness. The study is useful because it examined infrared heat specifically rather than treating every sauna type as identical.
However, it was not proof that one commercial sauna session guarantees faster recovery for every client. The sample was limited, the participants were trained and individual outcomes varied. Read the peer-reviewed post-exercise infrared-sauna study for the methods and limitations.
Later research has also examined repeated post-exercise infrared-sauna use across a training period. This developing evidence is interesting, but it remains much smaller than the broad marketing claims often made for sauna. The 2025 study on repeated post-exercise infrared sauna provides additional context.
Can you use an infrared sauna before exercise?
You can, but consider what you need from the upcoming workout. A brief, comfortable heat exposure may feel pleasant before gentle mobility or an easy session. It is less appealing before intense strength training, hard cardiovascular work or exercise in a hot environment.
A sauna is not a substitute for a movement-specific warm-up. Your warm-up should still prepare the joints, muscles, movement patterns and intensity you are about to use.
Potential drawbacks of pre-workout sauna
- Starting exercise after sweating and losing fluid.
- Feeling relaxed or heavy rather than alert.
- Adding thermal strain before a demanding session.
- Spending time in heat instead of completing a targeted warm-up.
- Making it harder to judge whether dizziness or fatigue is from heat or exercise.
If you feel light-headed, unwell, unusually fatigued or overheated, stop. Do not push through symptoms simply because heat is marketed as wellness.
How soon after a workout should you use the sauna?
There is no universal perfect minute. Finish the session, allow breathing and heart rate to settle, drink according to your needs and make sure you feel well before entering the heat.
A person completing gentle Pilates may be ready sooner than somebody finishing a long, high-intensity workout. The harder and hotter the training, the more cautiously you should approach additional heat.
Hydration matters
Sweating in the sauna adds to the fluid lost during exercise. Arrive hydrated, have water available and replace fluids sensibly afterwards. Avoid alcohol around sauna use because it can impair judgement and increase dehydration risk.
Hydration needs differ with body size, climate, workout duration, sweat rate and medical circumstances. More water is not always harmless either; do not force extreme quantities.
How long should a post-workout session be?
Follow the studio’s equipment guidance and start conservatively, especially if you are new to infrared heat or have just trained hard. Longer is not automatically better. A comfortable shorter session that you tolerate well is preferable to staying in until you feel depleted.
Bodi Boutique’s first infrared-sauna session guide explains preparation, what to expect and reasons to stop.
Does sauna reduce muscle soreness?
Warmth can feel soothing and the small infrared study reported lower perceived soreness in some conditions, but soreness is influenced by the workout, training experience, sleep, nutrition and time. A sauna should not be presented as a guaranteed treatment.
Severe pain, swelling, weakness or symptoms that seem disproportionate to the workout need appropriate assessment rather than another recovery session.
Does sweating remove lactic acid or toxins?
No. The familiar post-exercise soreness that appears a day or two later is not caused by lactic acid remaining trapped in the muscles. Your liver, kidneys, lungs and gastrointestinal system perform the body’s core waste-processing functions.
Sweating helps regulate temperature. A sauna can still be enjoyable and may have legitimate heat-related effects without needing a “detox” story.
Who should be cautious?
Seek medical advice before sauna use if you have relevant cardiovascular or blood-pressure concerns, are pregnant, take medications that affect hydration or heat tolerance, or have been advised to avoid heat. Do not use a sauna when intoxicated, acutely unwell or unable to respond reliably to heat.
General health sources such as the Mayo Clinic’s infrared-sauna overview emphasise that evidence remains limited for many health claims.
Planning sauna around Pilates and strength sessions
After a moderate Pilates or strength class, sauna may provide a calm conclusion to your visit. After a particularly demanding class, prioritise cooling down and assess how you feel before adding heat.
If recovery is the reason you are considering sauna, remember that sleep, progressive programming, sufficient food and appropriate rest remain more important than any single wellness treatment.
Infrared sauna at Bodi Boutique
Explore Bodi Boutique’s infrared-sauna service and the broader Feel wellness and recovery page. The aim is a considered wellness ritual that complements movement—not exaggerated promises about fat loss or detoxification.
If you are deciding between heat and light-based wellness experiences, read red light therapy versus infrared sauna.
For related wellbeing and recovery guidance, read Infrared Sauna vs Steam Room: What Is the Difference?.
What sauna clients tell us about the experience
At Bodi Boutique, clients frequently value the private, quiet time of an infrared sauna session. They commonly describe the experience as relaxing and say they leave feeling calm or refreshed.
That feedback can help explain why somebody may enjoy a sauna before or after a workout, but it is not a physiological outcome or a reason to ignore hydration, heat tolerance or individual health considerations.
Frequently asked questions
Is sauna better before or after Reformer Pilates?
After is usually simpler because you avoid adding heat and sweating before using moving equipment. Cool down, hydrate and make sure you feel well first.
Can sauna replace a warm-up?
No. A warm-up should prepare the movements and intensity of the planned workout.
Can I sauna after every workout?
Not automatically. Frequency should reflect your heat tolerance, training load, hydration and health circumstances.
Should I use sauna after a very hard workout?
Only if you have cooled down, feel well and can tolerate more heat. If you are dizzy, depleted or unwell, skip it.
The short answer
Choose post-workout infrared sauna in most cases. It keeps your exercise quality separate from the effects of pre-training heat and matches the timing used in emerging recovery research. Start conservatively, hydrate and treat the sauna as an optional recovery ritual rather than a guaranteed performance tool.
About the author
Jazz Collier is the owner of Bodi Boutique in Millmerran and has worked in fitness and beauty since 2016. Her Pilates education includes Online Fitness Education, Studio Pilates Mat and Reformer training, and Core Collab. This article provides general information and does not replace individual medical advice.
