Sauna Before or After Workout? What the Research Says
Sauna before or after workout? Most people should sauna after exercise. Here is the research on recovery and endurance, and how to fit sauna into training safely.
Most people should use a sauna after a workout, not before. Heat before training relaxes your muscles and starts dehydrating you, which can sap strength. After training, it supports relaxation and may boost endurance adaptations. As of October 2026, this is the most common timing question we see, with “sauna before or after workout” searched about 4,600 times a month in the US.
Why after is usually better
Before a workout, a hot sauna:
- Starts fluid loss before you’ve even begun
- Raises your core temperature, shortening how long you can work hard
- Relaxes muscles you want firing for heavy lifts or sprints
After a workout, a sauna:
- Extends the heat stress your body is already adapting to
- Encourages relaxation, helping you shift into recovery mode
- Gives you a structured cool-down ritual
What the research says about post-workout sauna
Endurance
A small but widely cited study published in the Journal of Science and Medicine in Sport in 2007 had male distance runners use a sauna (about 30 minutes at around 90°C) after training sessions for three weeks. Their run time to exhaustion improved by about 32%, and their blood plasma volume increased. Higher plasma volume helps your heart deliver more blood per beat and improves heat tolerance. The study was small (six runners), so treat it as promising rather than definitive.
Cardiovascular conditioning
Sauna raises your heart rate in a way that resembles moderate exercise. Combined with the Finnish research linking frequent sauna use to lower cardiovascular mortality (JAMA Internal Medicine, 2015), there’s a reasonable case for adding sauna to a training week. It isn’t a replacement for exercise, though.
Muscle soreness and recovery
Many athletes report reduced soreness after sauna, and heat increases blood flow to muscles. Evidence for faster muscle repair is mixed. Treat sauna as a relaxation and conditioning tool, not a guaranteed recovery hack.
Sauna before a workout: when it’s okay
A short 5–10 minute warm sauna can feel good as a gentle warm-up before mobility work or light cardio. Avoid long or very hot sessions before:
- Heavy lifting or power training
- Long endurance sessions in warm weather
- Any workout where you’re already short on water
Sauna vs cold plunge after training
If your goal is strength or muscle growth, some research suggests cold water immersion immediately after lifting may blunt muscle gains. Sauna doesn’t carry that concern. Many people save sauna-plus-cold-plunge contrast sessions for rest days or after cardio. See our sauna and cold plunge guide.
How long to sauna after a workout
| Situation | Suggested session |
|---|---|
| Traditional sauna, after strength training | 10–20 min, 1–2 rounds |
| Infrared sauna, after any workout | 20–30 min |
| After a very hard or hot workout | Rehydrate first, then 10 min |
| Beginners | 5–10 min |
Hydration matters most
You’ll already have lost fluid during training. Drink water, and consider electrolytes after long or sweaty sessions, before getting in. Weigh yourself before and after if you want a rough measure of fluid loss.
Who should be careful
- Anyone with heart disease or low or high blood pressure, or who’s pregnant: ask your doctor first
- After drinking alcohol: never sauna
- If you feel dizzy, nauseous or unwell: get out
Building sauna into your routine
The most consistent home sauna owners we found link sessions to training: a SaunaLife owner with a cold plunge, a Redwood owner with an outdoor shower, and a tent owner who follows every session with a plunge. A home sauna near where you train makes the habit easy. See our best home saunas and best outdoor saunas.
Frequently asked questions
Should you sauna before or after a workout?
After, for most people. A sauna before training relaxes muscles and dehydrates you, which can reduce strength and performance. After a workout, a sauna supports relaxation and recovery, and some research links post-exercise sauna to improved endurance.
What are the benefits of a sauna after a workout?
Post-workout sauna use may increase blood plasma volume and endurance, aid relaxation, and ease perceived muscle soreness. A small 2007 study found runners who used a sauna after training improved time to exhaustion by about 32%.
How long should you sauna after a workout?
About 10–20 minutes in a traditional sauna or 20–30 minutes in an infrared sauna, after rehydrating. Start shorter if you're new to sauna or the workout was very hard.
Is it okay to sauna before lifting weights?
A short 5–10 minute warm sauna won't hurt most people, but longer sessions before lifting can reduce strength and increase dehydration. A light warm-up is a better way to prepare.
Should I sauna or cold plunge after a workout?
Sauna is generally preferred after strength training, since some research suggests immediate cold immersion may blunt muscle growth. Many people do contrast sessions on rest days instead.