Sauna or Cold Plunge First?

Quick answer: Heat first, then cold. Start in the sauna, then move to the cold plunge. That is the traditional Nordic order and the one that makes physiological sense, because the heat opens the body up and the cold that follows drives blood back to the core and locks in the contrast. The more useful question is what you end on: finish cold for energy and focus, finish warm to wind down.

Why heat comes first

A sauna widens your blood vessels and moves blood toward the skin. Step into cold water after that and the body slams those vessels shut, pushing blood back toward the core in a fast, deliberate swing. That swing, from wide open to clamped down, is the whole point of contrast.

Reverse the order and you blunt it. Start cold and your vessels are already constricted, so the heat that follows has less room to work and the contrast is muted. Heat first sets up the bigger response.

Worth being straight about the evidence, because the internet states this with more certainty than the data earns. There are very few head-to-head trials comparing the two orders for health outcomes. The heat-first convention rests on the mechanism and on centuries of practice rather than on one decisive study. It is the sensible default, not a law.

What you end on is the real decision

This is the part that actually changes how you feel afterward, and it depends on what you want from the session.

End on cold for alertness. Finishing in the cold keeps noradrenaline and dopamine elevated and makes the body rewarm itself, which extends the lift and the focus. This is the version for a morning session or any day you want to walk out sharp.

End on warm to come down. Finishing on heat shifts the body toward its rest state and relaxes muscle. A small crossover trial of contrast footbaths found that ending on the warm side produced higher self-reported relaxation than ending cold (Made et al., 2024). This is the version for an evening, when the goal is to settle before sleep.

Neither is more correct. They are two different tools, and the only question is which one the day calls for.

The rounds in between

Most real sessions are not one round. The Nordic cycle repeats: heat until the body is working, cold until the breath catches and steadies, then back to heat, two or three times through. The cardiovascular system adapts quickly inside a session. In a study of healthy women moving through repeated heat-and-cool cycles, blood pressure response settled across the rounds rather than building up (Aird et al., 2025). The repetition is the training.

One caveat for anyone lifting weights

If you train for muscle or strength, keep the cold away from the lift. A 12-week trial found that a cold plunge taken right after leg training shut down the growth the active-recovery group made (Roberts et al., 2015). The cold blunts the inflammatory signal the muscle needs to adapt. Separate the plunge from the workout by a few hours, or take it on a rest day. We go deeper on this trade-off in Recovery Is Not Neutral.

The simple rule

Heat, then cold, repeated for a few rounds. End cold if you want to feel switched on, end warm if you want to wind down. At Elahni the session runs in that order, guided round by round, so you can stop thinking about the sequence and feel it.

See also: What Is Contrast Therapy? · What Cold Does to the Brain · Recovery Is Not Neutral · Does a Sauna Before Bed Help You Sleep?

Contrast therapy at Elahni is a guided sauna and cold plunge in NoMad, Manhattan. Reserve a session.