You’ve probably heard that sauna helps with recovery. But if your goal is to build muscle, reduce soreness, and get stronger, when you use the sauna matters just as much as how you use it.
Let’s break down what the research suggests.
Recovery Starts Long Before You Feel Sore
Every workout creates tiny amounts of stress within your muscles. That’s intentional.
Strength doesn’t happen while you’re lifting weights. It happens afterward, when your body repairs those microscopic changes and adapts by becoming stronger.
Recovery is where the work you put into training begins to pay off.
Sauna After Strength Training
One of the biggest benefits of sauna is increased blood flow.
As your body warms, blood vessels dilate, allowing oxygen and nutrients to circulate more efficiently throughout the body. This may help deliver the building blocks your muscles need after exercise while helping remove metabolic byproducts.
Researchers have also found that repeated sauna bathing can increase production of heat shock proteins – specialized proteins that help protect cells from stress and support cellular repair.
Some studies have also observed temporary increases in growth hormone after sauna sessions. While these short-term hormone changes alone are unlikely to build muscle, they may contribute to the body’s overall recovery response when combined with consistent training.
Timing Matters
For most people focused on strength and muscle growth:
✅ Lift first.
✅ Sauna afterward.
Using the sauna after resistance training allows you to benefit from heat without reducing the quality of your workout.
If you’re doing an especially intense lifting session, spend a few minutes hydrating before entering the sauna.
Aim for:
- 15 – 20 minutes
- 175 – 195°F (traditional Finnish sauna)
- Rehydrate afterward with water and electrolytes
What About Cold Plunge?
Cold exposure is excellent for reducing soreness and helping you feel refreshed.
However, if your primary goal is maximizing muscle growth, several studies suggest that immediately plunging into cold water after resistance training may reduce some of the cellular signals involved in muscle hypertrophy.
That doesn’t mean cold plunge is “bad.”
It simply means timing matters.
A simple guideline:
If today’s workout is focused on building muscle:
- Lift
- Sauna
- Wait several hours before cold plunge – or save the plunge for another time of day.
If today’s goal is recovery, reducing soreness, preparing for another competition, or you’re in-season:
Contrast therapy (sauna and cold plunge) can be an excellent choice.
Consistency Beats Perfection
The biggest benefits don’t come from one perfect recovery session.
They come from making recovery part of your weekly routine.
One of the largest long-term sauna studies ever published followed more than 2,300 adults in Finland for over 20 years. Participants who used the sauna regularly had significantly lower rates of cardiovascular events and lower all-cause mortality than those who used it less often. While this study wasn’t specifically about athletes or muscle growth, it reinforces an important principle:
Health is built through consistent habits.
How We Like to Recover at Ash & Sage
Every person recovers differently, but a simple routine many of our members enjoy looks like this:
✔ Finish your workout.
✔ Rehydrate.
✔ Spend 15–20 minutes in the traditional Finnish sauna.
✔ Cool down naturally or, depending on your training goals, enjoy a cold plunge.
✔ Relax, breathe, and let your body begin the work of rebuilding.
Recovery isn’t about doing less.
It’s about giving your body what it needs so you can keep showing up.
Final Thoughts
Muscle is built in the gym.
Recovery is where your body catches up.
Whether your goal is lifting heavier, recovering faster, sleeping better, or simply feeling your best, making sauna part of your weekly routine may help support both your performance and your long-term health.
At Ash & Sage, we’ve created a space where recovery isn’t an afterthought – it’s part of the ritual.
visit us at www.ashandsagespa.com and get $20 off your first session!
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