Do Ice Baths Actually Help Recovery?

In 2014, researchers at Victoria University in Melbourne had people do four flat-out 30-second sprints on a bike, then sit in one of three baths. One was cold. One was lukewarm. The third was lukewarm with a new “recovery oil” poured in while they watched, alongside a glossy summary of the research behind it.

The oil was Cetaphil skin cleanser.

Over the next two days, the soap bath brought people’s strength back about as well as the cold one, and both beat plain lukewarm water. The paper’s title doesn’t hedge: Postexercise cold water immersion benefits are not greater than the placebo effect.

That doesn’t mean ice baths do nothing. It means we don’t know how much of what they do is the cold.

What it does

The best summary is a 2022 meta-analysis in Sports Medicine: 52 studies comparing cold-water immersion with doing nothing after hard exercise.

• Soreness and feeling recovered: moderate benefit. The most consistent result.
• Power the next day (jumping, sprinting): small benefit.
• A blood marker of muscle damage: lower.
• Strength recovery: no meaningful effect.

A companion paper found cold water beat active recovery, warm water and contrast baths on soreness, and roughly matched them on everything else.

The catch is that the strongest results are the ones people score themselves. You can hide a sugar pill. You can’t hide cold water from someone sitting in it. One review notes that blinding “was problematic, especially with hydrotherapy.”

What it costs

In a 2015 trial, 21 young men trained their legs twice a week for 12 weeks. After each session, half sat in water at about 10 °C for 10 minutes; the other half did easy cycling. By the end, as a later review reports it, thigh muscle had grown about 15% in the cycling group and about 2% in the cold group. Leg-press strength rose about 59% against 42%.

Biopsies showed why. The signalling that tells muscle to rebuild bigger was turned down after the cold. The inflammation that makes you sore is part of the message to adapt. Cool it, and you quieten the message.

The wider evidence points the same way, more gently:

• Grgic, 2022 — 10 studies, 170 people: cold water after lifting reduced strength gains. Small effect. Whole-body immersion made no significant difference; cooling just the trained limb did.
• Piñero et al., 2024 — 8 studies on muscle size: smaller growth with cold water, but the statistics don’t rule out no effect. The authors say it “may” blunt growth.

The benefit might be in your head. The cost is in your legs. Both of those are a “maybe.”

Runners: probably fine

Endurance is less clear. An older study (Yamane, 2006) found regular cold water blunted aerobic gains. A 2026 trial put 16 men through five weeks of hard intervals, three a week, with 15 minutes at about 11 °C after every session. They improved exactly as much as the group that skipped the cold. Two small studies, opposite answers; the newer one measured more and found nothing.

Where it earns its place

Tournaments and congested schedules. In a three-day tennis protocol, soreness climbed day on day with no recovery treatment, and didn’t with cold water. In a simulated football tournament — three matches in five days — sprint speed came back better. The authors called the benefit “limited.” In the week of a tournament, limited is enough. Nobody is trying to build muscle on day three.

Heat is different again. For exertional heat stroke, cold-water immersion is the medical gold standard: “cool first, transport second.”

If you’re going to do it anyway

• Dose: 10–15 minutes. About 11–15 °C for soreness; 5–10 °C looked slightly better for power. A 2025 network meta-analysis of 55 trials found nothing favouring longer. It’s cold water, not a tub of ice.
• Skip it straight after strength or muscle-building sessions.
• Use it in competition weeks, runs of matches, and heat.
• Don’t worry much about it after interval running.

Who isn’t in the studies

Almost every participant is a young man. The Grgic review had 14 women out of 170. The dose analysis had one women-only study out of 55. There is essentially nothing on teenagers.

A parent putting a teenager in an ice bath because the professionals do it isn’t following the evidence. They’re running an experiment nobody has run.

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You don’t decide whether to use an ice bath. You decide which week you’re in.

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Jurisdiction: the studies are from Australia, Europe and the US. No money figures are used. Almost every participant is a young man; there is essentially no data on women or teenagers.

Sourcing note: the 2014 placebo study is described from three consistent secondary accounts (The Globe and Mail, Alexander Training, SSISA Academy); the paper itself is paywalled. The 2015 trial’s figures are as reported by Petersen & Fyfe (2021). The 2026 endurance trial is from its published abstract.

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Sources: Broatch, Petersen & Bishop, “Postexercise cold water immersion benefits are not greater than the placebo effect,” Medicine & Science in Sports & Exercise, 2014 · Moore et al., Sports Medicine, 2022 (two papers) · Xiao et al., Frontiers in Physiology, 2023 · Roberts et al., Journal of Physiology, 2015 · Petersen & Fyfe, Frontiers in Sports and Active Living, 2021 · Grgic, European Journal of Sport Science, 2022 · Piñero et al., “Throwing cold water on muscle growth,” European Journal of Sport Science, 2024 · Malta et al., Scandinavian Journal of Medicine & Science in Sports, 2026 · Poignard et al., European Journal of Applied Physiology, 2023 · Leeder et al., European Journal of Sport Science, 2019 · Belval et al., consensus statement on exertional heat stroke, Prehospital Emergency Care, 2018 · network meta-analysis of cold-water immersion dose, Frontiers in Physiology, 2025.