How long should you sit in an infrared sauna? A session guide

The question every new owner asks in week one — and the answer most articles give ("20–45 minutes!") skips the part that matters: how you get there, and how to tell when your session is done. Here's the practical version.

The short answer

Start at 10–15 minutes. Build over a few weeks to 25–40 minutes. Most experienced users settle around 30. There's no prize for 60 — past a point you're just losing more water, not gaining more benefit.

Why you build up rather than diving in

Heat tolerance builds with repetition — that much is well described. Most people find they sweat more readily and simply cope with the heat better after a few weeks, which is why session twenty feels completely different from session one. The classic beginner error is judging the whole experience by a heroic first 45 minutes that ends dizzy and headachy (that's dehydration, not the sauna). Give it two or three weeks of short sessions and the same cabin transforms.

Week 1: 10–15 minutes, comfortable temperature, out while you still feel great. Weeks 2–3: stretch toward 20–30 as it feels easy. Ongoing: 25–40 minutes, to taste. An infrared cabin's gentler air (45–60°C, versus 80–100°C traditional) is exactly what makes this gradual, sustainable approach pleasant rather than an endurance sport.

How often per week?

Regular use is where sauna habits pay off — the research on benefits, such as it honestly is, consistently involves frequent use. Three to five sessions a week is a common settled rhythm; daily suits plenty of healthy adults who are hydrating properly. If you have any medical condition, ask your GP first. At 16p–34p a session, frequency is not a cost decision — it's purely about what your body enjoys. Consistency beats duration: five easy half-hours beat one weekend marathon, every time.

The signals that mean the session is over

Your body ends the session, not the timer. Come out when: you feel light-headed, dizzy or sick (out now, cool down, drink — and take the next session shorter); your heart is racing beyond a comfortable workout feel (and if it doesn't settle once you're out and cooled down, get it looked at); you've simply stopped enjoying it — restlessness at heat is a real signal, not weakness; or you notice you've stopped sweating despite the heat, which means you're behind on fluids. None of these are dramas if you respect them immediately. All of them become one if you sit through them to finish an arbitrary number.

The bits around the session

Before: a glass of water, no alcohol (the full safety rules). Timing: evening sessions are popular for a reason — a lot of owners find the warm-then-cool pattern afterwards helps them drop off, though the evidence there is moderate rather than settled; on training days, after the workout beats before it. After: rehydrate properly, shower when you've stopped sweating, and give yourself ten quiet minutes — the post-sauna calm is half the product.

And leave the phone outside. Partly heat (electronics dislike 55°C), mostly the point: a 30-minute session you can't scroll through is the closest thing to enforced rest most of us get. Owners consistently say it's the feature nobody advertised.

New to all this? The Kajo range heats up in 10–15 minutes, which is what makes short frequent sessions practical — and the buying guide covers everything else. Questions? WhatsApp us.

This article is general information, not medical advice. If you're pregnant, have a heart condition, or take medication that affects blood pressure or sweating, speak to your GP before starting regular sauna use.