Contrast therapy is the oldest wellness protocol there is: heat the body thoroughly, cool it decisively, rest, repeat. The Finns have run this loop for a thousand years without an app. Here's how to run it well.

The basic round

1. Heat — 10 to 20 minutes. Sauna at 170–200°F. You're done when you're sweating freely and your breath wants to slow down — not when you're dizzy. Dizzy means you stayed too long.
2. Cold — 1 to 3 minutes. Into the plunge, up to the neck. Exhale as you enter; the gasp is normal, the panic is optional. Slow the breath and the body follows.
3. Rest — 5 to 10 minutes. The round isn't done when you exit the water — it's done when you feel normal again. Sit, drink water, do nothing. This is the part everyone skips and it's half the practice.

Two or three rounds is a full session. End on cold if you want to walk out sharp; end on rest if it's an evening wind-down.

Temperatures that make sense

Colder is not a merit badge. A 50°F plunge after a 190°F sauna is a serious contrast — the delta is what you're after, not the number on the chiller. Newcomers do well at 50–55°F. With practice, the mid-40s. Below that is for people who've built up to it, in shorter exposures.

The mistakes that ruin it

• Skipping the rinse. Sweat is the fuel for every water-quality problem a plunge can have. Rinse between the sauna and the plunge — every time. Your water will last twice as long. (The full chemistry is in our water guide.)
• Racing the clock. Breath control beats duration. Three calm minutes beat six white-knuckled ones.
• Plunging alone, or after drinks. Cold water is a genuine physiological stressor. Respect it and it gives; disrespect it and it takes.
• Quitting the rest. Back-to-back heat and cold without recovery isn't a harder practice — it's a worse one.

Why we build both

A contrast session lives or dies on the transition — the walk from hot room to cold water. That's why we build the sauna and the plunge as one installation: same cedar, same stains, same shop, placed so the loop flows. Heat, cold, rest, repeat, with nothing in between but a few steps of night air.

The Cold Plunge · Our Saunas · Cold Plunge FAQ

Nothing here is medical advice. Talk to your doctor before starting sauna or cold water practice — especially if you're pregnant or managing cardiovascular, blood pressure, or respiratory conditions.