Cold Exposure, Ice Baths & Recovery

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Hypertrophy mechanisms
Getting into cold water straight after strength training may damp down the anabolic signals that make muscle grow. In Roberts 2015, the group that took a cold soak after each session gained less muscle and less strength over 12 weeks than the group that did active recovery; after a single session, biopsies showed a smaller rise in p70S6K phosphorylation and in satellite cells. The evidence comes mainly from this one small study: the direction is clear, the size still needs confirming.
DOMS soreness
Cold-water immersion after training fairly consistently eases soreness: cooling slows the nerves that carry pain, and tighter vessels mean less leakage and swelling. But feeling less sore does not mean the tissue has been repaired; in the Hohenauer 2015 pooled analysis, function improved less consistently than soreness did.

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Why cold dulls pain

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Cold water can make soreness ease noticeably within minutes. The blood vessels under the skin tighten and push blood toward the core, the nerves that carry pain slow down, and the muscle that was hot and swollen a moment ago feels as if it is behind a layer of padding — you really do feel better. But feeling less sore does not mean the tissue has been repaired, and the very move that relieves the pain (vessels tightening) is also the move that cuts the supply to the muscle.

Recovery can have two goals: easing pain quickly so you can compete again, or letting the training stimulus stay so the body adapts. The two sometimes conflict, so whether an ice bath is a good idea depends on which one you want today.

Cold water also carries acute risks. In the first minute after you get in, you take a deep breath you cannot control, and if your head is under water at that moment you can inhale water. If after getting out someone is confused, or has chest pain or palpitations that will not stop, get medical help immediately.

Educational content, not medical advice — consult a clinician.

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Cold Exposure, Ice Baths & Recovery

Story

Connected to · 2

regulates · 2

Hypertrophy mechanisms
Getting into cold water straight after strength training may damp down the anabolic signals that make muscle grow. In Roberts 2015, the group that took a cold soak after each session gained less muscle and less strength over 12 weeks than the group that did active recovery; after a single session, biopsies showed a smaller rise in p70S6K phosphorylation and in satellite cells. The evidence comes mainly from this one small study: the direction is clear, the size still needs confirming.
DOMS soreness
Cold-water immersion after training fairly consistently eases soreness: cooling slows the nerves that carry pain, and tighter vessels mean less leakage and swelling. But feeling less sore does not mean the tissue has been repaired; in the Hohenauer 2015 pooled analysis, function improved less consistently than soreness did.

Read full story

Stop 1/5

Why cold dulls pain

EVIDENCEREVIEW 1

READ THE ORIGINAL

Cold water can make soreness ease noticeably within minutes. The blood vessels under the skin tighten and push blood toward the core, the nerves that carry pain slow down, and the muscle that was hot and swollen a moment ago feels as if it is behind a layer of padding — you really do feel better. But feeling less sore does not mean the tissue has been repaired, and the very move that relieves the pain (vessels tightening) is also the move that cuts the supply to the muscle.

Recovery can have two goals: easing pain quickly so you can compete again, or letting the training stimulus stay so the body adapts. The two sometimes conflict, so whether an ice bath is a good idea depends on which one you want today.

Cold water also carries acute risks. In the first minute after you get in, you take a deep breath you cannot control, and if your head is under water at that moment you can inhale water. If after getting out someone is confused, or has chest pain or palpitations that will not stop, get medical help immediately.

Educational content, not medical advice — consult a clinician.