Does Cold Water Immersion Reduce Muscle Soreness?

Yes — but the effect appears to be modest, and the evidence is more complicated than the cold-plunge industry often suggests.

Cold water immersion can reduce how sore you feel after strenuous or unfamiliar exercise. Several systematic reviews and meta-analyses have found a benefit compared with passive recovery, particularly for delayed onset muscle soreness (DOMS).

But there is an important qualification: the effect is not large, the studies are heterogeneous, and there is no established need to make the water as cold as possible.

The research also contains a useful warning for anyone who lifts weights regularly: using cold water immediately after resistance training may interfere with some of the adaptations you are training to achieve.

So what does the evidence actually tell us?

Does cold water immersion reduce muscle soreness?

The answer is probably yes, to a modest degree.

A 2016 systematic review and meta-analysis looked specifically at cold water immersion after exercise and included nine randomised trials involving 169 participants. It found that cold water immersion produced a small benefit over passive recovery for both immediate and delayed muscle soreness. The researchers estimated that the reduction in soreness could be around 5% in the most favourable scenario.

That number needs to be handled carefully.

It does not mean that taking a cold plunge will make everyone 5% less sore. It was the upper-end estimate from a small evidence base, and the authors rated the methodological quality of the included trials poorly, with a mean PEDro score of 4.2 out of 10. They concluded that higher-quality research was needed.

More recent research strengthens the case that cold water can reduce post-exercise soreness, although it also makes the picture more complicated.

A 2025 network meta-analysis included 55 randomised controlled trials and 1,139 participants. It found significant reductions in DOMS with both 5–10°C and 11–15°C immersion for 10–15 minutes. For soreness specifically, the 11–15°C protocol ranked highest in that analysis.

But a newer systematic review published in July 2026 reached a more cautious conclusion. It analysed 52 studies and found that cold water immersion reduced DOMS overall, but the differences between approximately 5°C, 10°C and 15°C were not statistically significant. The authors concluded that no particular temperature range can currently be considered superior.

So the honest conclusion is:

Cold water immersion appears capable of reducing muscle soreness, but the effect is modest and we cannot currently say that one exact temperature is definitively best.

What temperature should you use?

This is where the research is particularly interesting.

Older research points towards 11–15°C for roughly 11–15 minutes as a sensible protocol for soreness. The 2016 Machado analysis found that range produced the best results within the temperatures and durations it studied.

The 2025 network meta-analysis reached a similar conclusion for DOMS, ranking 10–15 minutes at 11–15°C highest for soreness, with a SUCRA probability of 84.3%.

But the 2026 evidence means we should stop short of calling that the proven optimum.

The latest temperature-specific meta-analysis found numerically larger reductions in soreness at approximately 10–15°C than at approximately 5°C, but the differences between temperature groups were not statistically significant.

A sensible interpretation

If your objective is simply to experiment with cold water for post-exercise soreness, around 10–15°C for 10–15 minutes is a reasonable evidence-informed starting point.

There is currently no compelling evidence that you need to take the water down to 3°C to achieve a better result.

And that distinction matters.

A chiller being capable of reaching 3°C is a product specification. It isn't evidence that 3°C is the right temperature for recovery.

The research has studied temperatures as low as 5°C, and colder is not automatically better.

What about very cold water?

The 2025 research actually found an interesting split.

For soreness, 10–15 minutes at 11–15°C ranked highest.

For next-day jump performance and creatine kinase, the 10–15 minute, 5–10°C protocol ranked higher. The researchers therefore concluded that different outcomes may favour different temperatures.

But even that shouldn't be interpreted as:

"Colder water is better for recovery."

The newer 2026 research found substantial heterogeneity and did not establish a superior temperature range.

There is therefore no good reason to assume that making a plunge colder automatically makes it more effective.

How long should you stay in?

Again, the evidence points towards a fairly short session.

The 2016 meta-analysis found that 11–15 minutes produced the best results for soreness within the protocols it analysed.

The 2025 network meta-analysis similarly found that 10–15 minute sessions performed well across the outcomes it examined.

That doesn't mean 15 minutes is a magic number.

It means that if you're looking for a practical starting point, 10–15 minutes is much closer to the research than simply staying in as long as you can tolerate.

Longer isn't automatically better.

What if you are trying to build muscle?

This is where the answer changes.

If your primary objective is muscle growth or strength development, regularly taking a cold plunge immediately after resistance training may not be the best strategy.

A 2021 review concluded that repeated post-exercise cold water immersion can attenuate some adaptations to resistance training, including aspects of muscle hypertrophy, strength and power. The evidence is not perfectly consistent across every measure, but there is enough concern that the authors recommend caution.

A newer 2026 network meta-analysis reached a similarly important conclusion: for resistance training where the goal is increasing strength without disrupting training adaptations, passive recovery may be preferable to routine post-exercise cold water immersion.

That doesn't mean:

"Never use a cold plunge if you lift weights."

It means you should think about why you're using it.

If your priority is maximising the adaptation from a strength session, immediately cooling the muscles after every workout may not make sense.

If your priority is feeling better after a particularly hard session, competition or demanding training block, the calculation may be different.

The best protocol therefore depends on the training objective.

What about running, cycling and endurance training?

The evidence is less concerning here.

The 2021 review found that cold water immersion did not appear to impair endurance-training adaptations in the same way that it may affect resistance-training adaptations.

A 2026 network meta-analysis also found that moderate-temperature protocols around 9–12°C for 10–15 minutes can provide recovery benefits after endurance exercise, although the researchers rated the certainty of that evidence as low.

So again, context matters.

There isn't one universal cold-plunge protocol that makes sense for every type of training.

Is muscle soreness the same as muscle damage?

No.

This is an important distinction that gets lost in cold-plunge marketing.

DOMS is the soreness you perceive after exercise.

Creatine kinase (CK) is a blood marker that researchers sometimes use when studying exercise-induced muscle damage.

Strength, power and performance are different outcomes again.

A cold plunge can influence these measures differently.

The 2025 network meta-analysis demonstrated exactly that: the temperature-duration combination that ranked highest for soreness wasn't the same one that ranked highest for jump performance or CK.

So a lower CK number does not automatically mean you will feel less sore, and feeling less sore doesn't necessarily mean your muscles have recovered from every aspect of the training stimulus.

Is cold water immersion safe?

Cold water is a physiological stressor, not simply a refreshing bath.

The RNLI defines water below 15°C as cold water and warns that sudden immersion can cause involuntary gasping, rapid changes in breathing, increased heart rate and increased blood pressure.

For a controlled cold plunge, the sensible approach is therefore straightforward:

• Enter gradually rather than jumping in.
• Keep your breathing under control.
• Keep your face clear of the water initially.
• Don't turn the session into a test of how long you can endure it.
• If you feel unwell, get out.

The RNLI specifically advises against jumping straight into cold water and recommends allowing yourself time to acclimatise.

If you have a heart condition, the British Heart Foundation advises discussing cold-water activity with your doctor or specialist nurse because cold shock can increase cardiovascular stress and the risk of abnormal heart rhythms.

So, what is the practical answer?

If your question is:

"Will a cold plunge make me less sore after hard exercise?"

Probably, but don't expect a dramatic effect.

"What's the evidence-informed temperature?"

Around 10–15°C is a sensible starting range.

The evidence does not currently justify saying that one exact temperature is universally best.

"How long?"

Around 10–15 minutes is a reasonable evidence-informed starting point.

"Should I use it immediately after every weights session?"

Not if maximising strength or muscle growth is your primary objective. Regular immediate post-lifting immersion may interfere with some training adaptations.

"Do I need 3°C water?"

No evidence says you do.

The research has examined much colder water, but colder is not automatically better, and the latest temperature-specific review did not establish a superior temperature.

What does this mean when choosing a cold plunge?

The research gives you an interesting buying principle:

Control matters more than chasing the lowest number on the temperature display.

A plunge that can reliably hold a chosen temperature allows you to repeat a protocol consistently. Filtration and water treatment reduce the friction of ownership. And a system you are actually prepared to use is more useful than one whose specification looks impressive but whose real-world routine you never establish.

That is why the sensible question isn't:

"How cold can this plunge get?"

It is:

"Can this plunge reliably hold the temperature I actually intend to use?"

For practical guidance, see our guide to cold-plunge session length, our cold plunge vs ice bath comparison, and our UK cold-plunge running-cost guide. If you're choosing between models, our cold-plunge collection sets out the published specifications so you can compare them directly.

The bottom line

Cold water immersion can reduce muscle soreness after strenuous exercise, but the effect is modest and the science does not support the idea that colder is automatically better.

The most defensible practical starting point is 10–15 minutes at roughly 10–15°C if soreness reduction is your objective. But that should be treated as an evidence-informed range, not a magic prescription.

And if you're training specifically for strength or muscle growth, don't automatically plunge immediately after every lifting session.

The useful lesson isn't that you need the coldest water possible.

It's that the right protocol depends on what you're trying to achieve.