The science

Heat, then cold, then rest. Here’s what it does.

Circulation

Heat opens blood vessels, cold closes them. Going between the two gives your circulation a workout.

Switching off

The heat slows you down. For a lot of people it’s the easiest hour of the week to properly relax.

Better sleep

Your body cools after a sauna, the same signal it uses to fall asleep. Many people sleep well that night.

Recovery

Cold water can ease muscle soreness after exercise. Heat helps tight muscles loosen.

Mood

Cold water releases noradrenaline and dopamine. It’s why people come out buzzing.

Clear head

It’s hard to think about anything else in cold water. Fifty minutes off your phone helps too.

Fewer sick days

In one large study, people who ended their shower on cold took fewer days off sick.

Community

Conversations start in a sauna. It’s built for the town as much as for wellbeing.

The research

Finland, 2015JAMA Internal MedicineMen using a sauna 4-7 times a week had a lower risk of fatal heart disease than those going once.
Czech Republic, 2000Eur. J. Applied PhysiologyCold water raised noradrenaline around fivefold and more than doubled dopamine.
Netherlands, 2016PLOS ONEPeople ending showers with 30-90 seconds of cold took 29% fewer sick days.
Worth knowingJ. Physiology, 2015Plunging straight after weight training can blunt muscle gains. Keep them apart.

A session

1. Heat10-15 minutes in the sauna. Less if you’re new.
2. ColdStart in the mildest tub. Go in slowly, breathe out long.
3. RestSit outside and let your body settle.
4. RepeatMost people manage two or three rounds in 50 minutes.

Speak to your GP first if you’re pregnant or have a heart or blood pressure condition. More in our FAQs. General information, not medical advice.

The best way to understand it is to try it.