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Wellness trend beloved by athletes and biohackers may actually do more harm than good: study
A study suggests that cold-water treatments after exercise may slow muscle recovery, despite their popularity among athletes and biohackers. In the trial, people who took a cold plunge regained slightly less strength and had signs of muscle damage for longer than those given heat or no treatment.
The researchers tested 40 participants after leg extensions reduced their maximum quadriceps strength by 36%. Over three days, strength recovered to 82% in the cold-water group, compared with 88 to 89% in the other groups; muscle-damage markers also remained elevated after three days for those who took a cold soak. None of the treatments reduced soreness over that period, though cold water briefly eased reported pain after one day. An expert said cold therapy may still help during repeated activity in hot conditions or events requiring rapid recovery.
In short
- Cold plunges may slow strength recovery after exercise.
- Muscle-damage markers stayed elevated for three days.
- Cold water briefly eased pain, but not lasting soreness.
Steelman: both sides, in good faith
The strongest fair case each way — we don't pick a winner.
The case for
Cold-water immersion may be a poor choice when the aim is to maximise recovery from a single strength-training session: in this trial, participants who took a cold plunge regained slightly less strength over three days and showed signs of muscle damage for longer, without sustained relief from soreness. Athletes seeking long-term strength gains could reasonably prioritise recovery methods that do not appear to blunt these responses.
The case against
The results suggest a modest, short-term difference in a small trial, rather than showing that cold-water treatments are harmful in every setting. Cold immersion may still be useful when athletes need to perform repeatedly in hot conditions or recover quickly between events, and its brief easing of pain after one day could matter when immediate comfort or readiness is the priority.
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