Hot Bath Wind-Down
Use a warm bath or shower 1-2 hours before bed to support passive cooling and relaxation.
Dosage & Timing
Evidence Strength
3/5 — ModeratePassive warming before bed can support relaxation and the subsequent cooling signal for sleep.
Overview
Use a warm bath or shower 1-2 hours before bed to support passive cooling and relaxation.
How To Do It
Step 1
Take a warm, not scalding, bath or shower 1-2 hours before bed.
Step 2
Keep lights dim afterward.
Step 3
Avoid screens and heavy meals after the bath.
Step 4
Track sleep onset for one week.
The Evidence
Each claim is linked to its source study. Confidence reflects the study design — systematic reviews and RCTs rank highest.
Short-term heat acclimation training improves physical performance↗
Short-term heat acclimation improved physical performance in healthy adults.
Primary Literature
Interactions & Warnings
Contraindications
- ⚠Dizziness with heat
- ⚠Unstable cardiovascular symptoms
- ⚠Unsafe bath access
Interactions
- •Complements sleep temperature optimization
Measurable Outcomes
Related Protocols
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Start with 15 seconds of cold at the end of your shower and build up. An accessible gateway to cold exposure that builds resilience, boosts mood, and improves stress tolerance.
Deliberate Cold Exposure
11 min/week total of cold immersion at 50-59°F across 2-4 sessions. Produces a 250% dopamine increase lasting hours, boosts metabolism, and builds mental resilience.
Finnish Sauna Protocol
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Contrast Therapy (Hot-Cold Cycling)
Alternate 3-5 min hot and 1-2 min cold for 3-5 cycles. Creates vascular pumping that enhances circulation, reduces inflammation, and accelerates recovery. End on cold.