The calorie math is brutal
Cold exposure does activate brown fat. It does raise energy expenditure. The amounts are just small.
Roughly 50 to 80 calories per 10-minute session. That is one cookie. A slow walk burns about the same, and the walk does not make you miserable.
Then hunger erases it
Cold exposure reliably increases appetite. You burn a cookie, then you eat two. The fat-loss math does not survive contact with your hunger.
This is the part the plunge influencers never film.
What the big review found
A 2025 systematic review and meta-analysis in PLOS One looked at cold-water immersion across health outcomes. The verdict: limited, inconsistent evidence. (PLOS One)
Not promising but early. Limited and inconsistent.
What ice baths are actually good for
Mood lift. Some people feel great afterward, and that is real. Perceived soreness reduction has some backing too.
Those are legitimate reasons to plunge. Fat loss is not one of them. Use the tool for what it does.
This guide is general information, not medical advice. If symptoms stick around or worry you, talk to a doctor.
Questions, answered
Do ice baths burn belly fat specifically?
No. Spot reduction is a myth, and the total calorie burn is tiny either way.
How many calories does a cold plunge burn?
Roughly 50 to 80 per 10-minute session. A slow walk burns about the same, without the shivering.
Are ice baths dangerous?
They carry risks for people with heart conditions. Talk to a doctor first. For healthy people, they are mostly just uncomfortable.