How many sauna rounds can I have in one session?

KLAFS FAQ for well-being

The answer to this question depends partly on how you feel on a given day, and partly on how regularly you use the sauna. If you use the sauna on a daily basis (which, believe it or not, is customary in Finland!), one round in the sauna is plenty. If you use your sauna twice a week, it’s fine to add a second round. And if you only use your sauna once a week – or less – three sauna rounds are perfectly acceptable. But it’s not advisable to enjoy more than three rounds in the sauna during any one session. Doing so will not enable you to enjoy the benefits of the sauna more fully; in fact, overdoing it can have quite the opposite effect.