Cold-Water Immersion
Cold immersion reliably reduces muscle soreness after hard training, and reliably does less for performance than people expect.
Research consistently shows cold-water immersion reduces delayed-onset muscle soreness compared with resting passively, with the best results from water around 10 to 15 degrees Celsius for 10 to 15 minutes. Pooled analyses also show it lowers creatine kinase, a marker of muscle damage. What it does not reliably do is restore performance: jump and maximal-strength outcomes are frequently null or mixed across the same reviews, and partial immersion has impaired immediate jump performance. Treat it as a tool for feeling better sooner rather than for performing better sooner.
- Misconception: 'Colder and longer is better.' The best-supported window is 10 to 15 °C for 10 to 15 minutes.
- Misconception: 'It speeds up recovery of strength and power.' Soreness improves; performance outcomes are frequently null.
- Does not treat injury
- Does not accelerate healing of muscle damage, only the perception of soreness
- Cardiovascular, vascular or clotting conditions → clinician before use
- Numbness, skin discolouration or pain during immersion → stop and seek advice
Every source below carries its own grade and links to the original study. This is the audit trail.