Heat · Sweat · Hydrate · Recover

The Heat Recovery Protocol

A practical sauna routine you can actually stick to: how hot, how long, how often, and what to do before and after. With starter to advanced levels and notes on how it changes for women.

Person resting outside a wooden sauna at dusk after a session — Heat is the easy part. The habit is what makes it work.

Our Sauna Recovery Guide covers why recovery matters. This post is the how: one simple routine, built on the doses used in the research, that fits into normal life.

4 Steps to Make Heat a Habit

Before: drink about 500 ml of water over 1–2 hours, no heavy meal in the last 30–60 minutes, and no alcohol.
During: a traditional sauna at about 80°C (70–90°C) for 15–20 minutes per round. Leave if you feel dizzy or unwell.
After: cool down gradually, then water plus sodium first. Eat a full meal about an hour later.
Weekly: 2–4 sessions a week. Build up slowly: consistency beats intensity.

The four steps of the Heat Recovery Protocol: before, during, after and weekly — Before, during, after and weekly: the whole routine on one page.

Why This Dose

The 80°C, roughly 20-minute pattern comes from the long-running Finnish sauna studies, where more frequent sauna use was associated with lower cardiovascular and all-cause mortality in middle-aged men (Laukkanen et al., 2015; 2018 review). These studies are observational: they show a pattern, not proof that sauna causes it. Researcher Dr. Rhonda Patrick notes the strongest associations were for sessions longer than 19 minutes at about 79°C (source), and that more heat isn't better (source). Andrew Huberman's simple weekly target, about 57 minutes in total split across sessions, lands in the same place (source).

The Protocol, Step by Step

1. Before: hydrate, eat light, skip alcohol

Drink about 500 ml of water over the 1–2 hours before. If you sweat heavily, add electrolytes.
Eat light. A general rule of thumb is to avoid a heavy meal in the 30–60 minutes before a sauna, and give a big meal longer to settle. A light snack is fine if you're hungry, as many people feel faint going in on an empty stomach.
Skip alcohol before and during sauna.
For the full pre-sauna routine, see What to Drink Before a Sauna Session.

2. During: temperature, time and listening to your body

In a traditional sauna, about 70–90°C suits most people. Build up to about 15–20 minutes per round.
Sit on a lower bench if it feels too hot. The top bench is the hottest.
Leave straight away if you feel dizzy, nauseous or unwell. Here's what happens when you sweat too much.

3. After: cool down, rehydrate, then eat

Cool down gradually with fresh air or a cool shower. A cold plunge is optional. If you've just done strength training, consider keeping cold away from that session.
Rehydrate first: water plus sodium, with some potassium and magnesium. Weighing yourself before and after shows how much you sweat. Here's why you need electrolytes after sauna.
Then eat. Many people find it best to wait until they've cooled down and rehydrated, about an hour after the session, before eating a full meal with protein, carbs and a little salt.
Rest. An evening session can help some people wind down, as cooling off afterwards may ease the transition into sleep (Huberman).

4. Weekly: how often

Two to three sessions a week is a solid base. Four or more is the pattern with the strongest associations in the Finnish data. Pick a rhythm you can keep.

Starter, Regular and Advanced Protocols

For a traditional sauna. Move up only when your current level feels easy, and drop back on tired or under-slept days.

Level	Temp	Time	Rounds	Per week	Key note
Starter (weeks 1–4)	60–70°C	5–10 min	1–2, with breaks	2	Leave early if unwell
Regular	70–80°C	15–20 min	1–2	3–4	Close to the research dose
Advanced (heat-adapted)	80–90°C	20–30 min total	2–3	4–7	Months of steady use first

Men vs Women: What Changes

Most sauna research has been done in men. Dr. Stacy Sims' work on female physiology fills some of the gaps (source; source).

Factor	Men	Women
Sweat	Sweat sooner, usually more	Generally sweat less
Cycle	n/a	Week before a period (and active pill weeks): core temperature is higher and plasma volume up to ~8% lower. Hydrate more; shorten sessions if needed
Menopause	n/a	Weaker heat-loss response, so start lower and shorter and cool down gradually. Not a treatment for symptoms
Sodium	Often higher total losses	Varies a lot person to person, so don't assume you need less
Adapting	Adapts with regular use	Adapts too (Mee et al., 2018)
Cold after	Often colder plunges	About 10–16°C is enough (Sims)
Pregnancy	n/a	Talk to your clinician before using heat

More on sodium in why high sodium electrolytes matter.

Traditional Finnish Sauna vs Infrared

Traditional Finnish wooden sauna on the left and an infrared sauna cabin on the right, split by a red line

	Finnish	Infrared
Air temp	About 70–100°C	About 60°C
Humidity	10–20%, rising briefly with löyly (water on the stones)	Low and dry
Session	15–20 min per round	Often longer, as the air is cooler
Sweat	Fast and heavy	Slower to build
Research	Large Finnish cohorts (observational)	Smaller, short-term studies
Best for	Matching the research dose; a social ritual	A gentler start; home use

Sources: Sims on sauna temperatures; Patrick on infrared.

Rehydration: The Step Most People Skip

SAUNABODI glass water bottle with bamboo lid and a Mixed Berry Electrolyte Mix box on a sauna bench beside a towel and sauna hat — Have your bottle and electrolytes ready before you go in.

Sweat carries sodium as well as water, so plain water only replaces part of what you lose. Huberman suggests drinking at least 16 ounces (about 475 ml) of water for every 10 minutes in the sauna, before, during or after, and including electrolytes, while noting there's no exact formula because sweat varies so much (source).

See how much sodium you lose in a sauna, water vs electrolytes after sauna and what is ORS hydration? for the detail.

To keep this step simple, Saunabodi Electrolytes is an ORS-inspired blend made for the hour after heat: one stick gives you 700mg sodium, 250mg potassium and 60mg magnesium, with 0g sugar and 10 calories.

Signs to Ease Off

Headache, dizziness, nausea or feeling unusually drained mean shorten the session, lower the heat or rehydrate better. See signs of electrolyte depletion after sauna and why sauna can cause headaches or dizziness.

Red flags: confusion, fainting or chest pain. Get out, cool down and seek medical help.

Who Should Check With a Doctor First

Talk to your doctor before starting a sauna routine if you have a heart condition, low or high blood pressure or a kidney condition, if you're pregnant, or if you take medication that affects blood pressure, heart rate or fluid balance. Never use a sauna after drinking alcohol.

This article is general information, not medical advice. If you have a heart, blood pressure or kidney condition, take regular medication, or are pregnant, check with your doctor before using a sauna or changing your sodium or electrolyte intake.

FAQ

What is the best sauna protocol for recovery?

A traditional sauna at about 80°C for 15–20 minutes, 2–4 times a week. Arrive hydrated, cool down gradually and rehydrate with water plus sodium.

How many times a week should I use a sauna?

Two to three times a week is a solid base. Four or more showed the strongest associations in the Finnish observational studies, but consistency matters most.

Should I eat before or after a sauna?

Eat light beforehand and avoid a heavy meal in the 30–60 minutes before. Afterwards, many people rehydrate and cool down first, then eat a full meal about an hour later.