Cold showers for mood: a jolt people like, on evidence that can't be blinded
Evidence is mixed or early — not worth paying for yet. · Mostly observational or animal data.
One big trial found people took fewer sick days and mostly felt energized, but nothing objective changed and nobody can be blinded to a cold shower. Free and safe for most, so it is a fine self-test — just weigh your own 14 days more than the internet's enthusiasm.
The world's evidence
- Effect, in daily-life terms
- In a 30-day RCT of 3,000 adults, ending showers cold cut self-reported sick days by about 29% but did not change illness frequency or measured quality of life; most participants said it gave them an energy boost, which is subjective and unblinded.
- Who was studied
- One large pragmatic RCT (n=3,018, 30 days) plus small physiology studies of cold-water immersion; no blinded trials on mood.
- Cheaper option with better evidence
- Daily brisk walk (30 min)
Worth knowing
Avoid with heart conditions or if pregnant unless cleared by a professional; the cold-shock gasp response is the risk, so start with 30 seconds and never in open water alone.
Your evidence
Research says what happens on average. Log it for 14 days and Feelments shows what changed in your sleep, energy or mood — a pattern in your own logs, not a claim.
Sources
- Randomized trial (2016) — Buijze et al., PLoS One — 30-day RCT (n=3,018): cold showers reduced self-reported sickness absence ~29%; no effect on illness days or quality of life; 64% continued after the trial.
Last reviewed 2026-09-03. Verdicts are editorial assessments of published research, at the population level.
Feelments is for personal tracking and general wellness education. It does not provide medical advice, diagnosis, or treatment.