| Factor | Heat (Sauna / Hot Bath) | Cold (Ice Bath / Cold Shower) |
|---|---|---|
| Best timing | Rest days, chronic tension | Immediately post-competition |
| Muscle growth | Neutral or positive | May blunt post-strength |
| Cardiovascular | Strong benefit (sauna) | Brief stress, adaptation |
| Inflammation | Promotes circulation | Reduces acutely |
| Mental effect | Relaxation | Alertness, energy |
| Evidence | Very strong (Finnish studies) | Good (endurance recovery) |
Choose Heat (Sauna / Hot Bath) when…
You're on a rest or recovery day, have chronic muscle tightness or tension, want the cardiovascular health benefits of regular sauna, or are recovering from a non-strength session.
Choose Cold (Ice Bath / Cold Shower) when…
You've just finished competition or intense endurance training, want acute inflammation reduction and soreness relief, or are doing deliberate cold exposure as a psychological stress practice.
Gear for both
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FAQ
How often should I use the sauna for health?
Research from Finnish sauna studies suggests 4-7 sessions per week of 15-20 minutes at 80-100°C is associated with the greatest cardiovascular and all-cause mortality benefits. Even 2-3 sessions per week shows significant benefit over none.
Should I use ice bath or sauna after a hard workout?
The research gives different recommendations depending on your goal. Cold water immersion (ice bath, 10–15°C for 10–15 minutes) reduces acute inflammation, DOMS perception, and perceived fatigue — useful for competition recovery when you need to perform again soon. Sauna post-exercise may impair acute muscle protein synthesis slightly, but is associated with cardiovascular adaptation and mental recovery benefits. For general training recovery (not competition), evidence slightly favours cold for soreness reduction; heat for longer-term adaptation.
What is contrast therapy?
Contrast therapy alternates between hot (sauna or hot bath) and cold (ice bath or cold shower) exposure, typically in 3–4 cycles. The alternating vasodilation (heat) and vasoconstriction (cold) is thought to act as a circulatory pump, improving metabolic waste clearance and reducing swelling. It is popular in professional sport settings. Evidence is modest but positive for perceived recovery and reduced DOMS compared to passive rest.