Is sauna really good for you?

Improves how well the lining of your blood vessels relaxes and opens (endothelial function) and blood pressure.

Spending regular time in dry or steam heat — typically 15–20 minutes at 80–100°C.

The Finnish research behind most of the strongest evidence used traditional dry saunas, while hammams and Persian bathhouses use moist heat at somewhat lower temperatures — both appear to trigger similar cardiovascular responses.

Heat-shock proteins, a family of proteins the body produces under heat stress to protect and repair cells, are one proposed biological mechanism behind sauna's benefits.

One of the very few things you can do sitting still that helps your heart about as much as exercise does.

Because the effect appears dose-dependent — more frequent use, greater benefit — sauna offers a rare health habit where simply doing more of something enjoyable pays off.

Its long history as a social ritual means the habit tends to be sustainable in a way many exercise programs aren't.

Persian hammam combined heat, steam, scrubbing, and social ritual — a weekly restorative practice.

The Persian hammam, often architecturally elaborate with domed ceilings and sequential hot and cool rooms, served as a center of both hygiene and community life for centuries.

Visiting the hammam was traditionally tied to specific life events and rituals — before weddings, after childbirth, before religious holidays — treating heat bathing as a marker of transition and renewal, not just routine cleaning.

Where tradition and science agree

• Both the Persian hammam tradition and Finnish sauna research agree that regular, frequent heat exposure — not an occasional indulgence — is where the real benefit lies.
• Both treat heat bathing as a social and restorative ritual as much as a physical one, and modern research on stress hormones and mood supports that the social, unhurried context likely adds to the physiological benefit.

• The Persian hammam traditionally combines heat with washing, scrubbing, and social ritual in a humid steam environment; the strongest modern mortality evidence comes from Finnish dry saunas at much higher temperatures, so the exact dose-response may not transfer perfectly between the two traditions.
• Hammam culture historically framed heat bathing mainly around cleanliness, community, and relaxation; modern research instead traces specific mechanisms — heat-shock proteins, blood vessel function, heart rate — that hammam-goers had no way to measure or name.

• 1–4 sessions per week of 15–20 minutes.
• Drink water before and after; let your body cool down gradually.

One small step today: If you have access to a sauna, book a 15-minute session this week.

Heat is one of the oldest medicines — the hammam knew this long before the studies did.