THE ICE BATH IS A SCAM

Well… the marketing might be.

For 27 years, I’ve watched the wellness industry take something physiological, wrap it in impressive language, put it in a beautiful room and sell it as a health breakthrough.

Cold-water immersion is a perfect example.

The ice bath itself isn’t a scam.

The problem is the story being sold around it.

“Flushes toxins.”

“Accelerates recovery.”

“Reduces inflammation.”

“Burns fat.”

“Boosts your immune system.”

“Optimises your health.”

Some of these claims contain a grain of truth. Others are wildly overstated.

And when you’re spending hundreds — or thousands — of pounds installing an ice bath at home or in a luxury gym, the distinction matters.

At Wellvia, we believe the question shouldn’t be:

“Does it feel good?”

It should be:

“What are you actually trying to achieve — and does the intervention help?”

LET’S START WITH THE SAUNA

Sauna has something that much of the wellness industry desperately wants:

long-term human data.

One of the most frequently cited studies followed 2,315 middle-aged Finnish men for a median of 20.7 years.

Compared with men reporting sauna use once per week, those reporting 4–7 sessions per week had substantially lower rates of sudden cardiac death, fatal cardiovascular disease and all-cause mortality. The study was published in JAMA Internal Medicine. (JAMA Network)

Sounds incredible.

But here’s the part that should always accompany the headline:

It was observational.

The study can show an association.

It cannot prove that sauna caused the reduction in mortality.

The people who sauna frequently may differ from those who don’t in ways that aren’t completely captured by the study — fitness, lifestyle, socioeconomic factors, health behaviours and many other variables.

So the scientifically honest conclusion isn’t:

“Sauna makes you live longer.”

It’s:

Regular sauna use is associated with better long-term cardiovascular and mortality outcomes in this population, but causation has not been established.

That’s less sexy.

It’s also more accurate.

And there is a growing body of research looking at the physiological effects of heat exposure, including cardiovascular and vascular responses.

That’s interesting.

But interesting isn’t the same as proven.

WHAT SAUNA DOESN’T DO

No — “Detox” your body

Sweating is primarily a thermoregulatory mechanism.

Your kidneys, liver and gastrointestinal system play the major roles in eliminating waste products and maintaining chemical balance.

A comprehensive review of sweat physiology concluded that the contribution of sweating to the elimination of waste products and toxicants appears to be minor compared with the kidneys and gastrointestinal tract. (PubMed)

There is evidence that certain toxic elements can be detected in sweat, so saying that sweat contains nothing potentially undesirable would also be too simplistic.

But that is very different from saying:

“Sweating detoxes you.”

It doesn’t turn a sauna into a detoxification treatment.

No — Burn meaningful amounts of body fat

You can weigh less after a sauna.

But you’ve mainly lost water.

You haven’t magically burned a kilogram of body fat because you sat in a hot room.

Replace the fluid and the scale moves back.

Yes — What sauna can do

It can produce substantial cardiovascular and thermoregulatory stress.

It can be relaxing.

It can become a consistent recovery ritual.

And observational evidence suggests associations with better cardiovascular outcomes.

That’s already interesting enough.

It doesn’t need a detox story.

NOW LET’S TALK ABOUT THE ICE BATH

This is where things get more complicated.

Cold-water immersion absolutely has physiological effects.

Cold causes peripheral vasoconstriction.

It changes blood flow.

It alters cardiovascular responses.

And it can influence pain perception and perceived recovery.

In some circumstances, that can be useful.

But here’s where the wellness industry gets itself into trouble.

RECOVERY IS NOT THE SAME AS ADAPTATION.

If you train hard, you aren’t simply trying to remove the discomfort.

You’re trying to create an adaptation.

You stress the body.

You recover.

The body remodels itself.

You become stronger, fitter or more capable.

And some of the biological processes involved in that adaptation are exactly what cold exposure can interfere with.

THE MUSCLE-BUILDING PROBLEM

One of the most important studies came from Roberts and colleagues in The Journal of Physiology.

Twenty-one physically active men completed 12 weeks of strength training.

After each training session they either performed 10 minutes of cold-water immersion or active recovery.

The cold-water group experienced smaller improvements in muscle mass and strength than the active-recovery group.

The researchers also observed differences in anabolic signalling and satellite-cell activity — mechanisms involved in muscle adaptation. (The Physiological Society)

That’s a pretty important finding if your goal is:

Build muscle.

And subsequent research hasn’t simply made the question disappear.

A systematic review and meta-analysis examining regular cold-water immersion alongside training found detrimental effects on several strength outcomes, although the evidence varies depending on the protocol and type of training. (PubMed)

Another meta-analysis found that post-exercise cold-water immersion attenuated muscular-strength gains overall, although importantly, the results differed depending on whether cooling was applied locally or to the whole body. (PubMed)

So we shouldn’t turn this into:

“Ice baths destroy gains.”

That’s too simplistic.

The better conclusion is:

If hypertrophy and strength adaptation are your priority, routinely jumping into very cold water immediately after resistance training may not be the smartest strategy.

BUT DOES COLD WATER HAVE NO BENEFIT?

No.

And this is where the anti-ice-bath argument can become just as dogmatic as the pro-ice-bath marketing.

A large systematic review and meta-analysis examining cold-water immersion after strenuous exercise found evidence that CWI can help with muscle soreness, while effects on other recovery outcomes are more mixed. (PubMed)

So if you’ve just played a brutal rugby match, completed a tournament, raced multiple days in a row or need to perform again soon, reducing perceived soreness or improving short-term recovery may actually be useful.

That’s a completely different proposition from:

“Ice baths are essential for building muscle and living longer.”

They aren’t.

THE REAL QUESTION IS: WHAT ARE YOU TRAINING FOR?

This is where personalised health should replace wellness dogma.

YOUR GOAL: MAXIMUM HYPERTROPHY

Think twice about cold immersion immediately after lifting.

You’re deliberately trying to stimulate adaptation.

Why potentially blunt part of that process?

YOUR GOAL: MAXIMUM STRENGTH

Again, timing matters.

Regular immediate post-training CWI may not be the best default strategy.

YOUR GOAL: MULTIPLE PERFORMANCES IN A SHORT WINDOW

Different story.

If you’re competing again tomorrow — or later today — the priority may be getting you ready to perform again rather than maximising long-term adaptation from the previous session.

YOUR GOAL: PERCEIVED RECOVERY

Cold water may have a place.

If you genuinely feel better after it, that matters.

But “I feel better” isn’t automatically the same thing as “my muscles have recovered faster.”

YOUR GOAL: STRESS EXPOSURE

Now we’re entering a different conversation entirely.

Cold exposure is an acute physiological stressor.

There is interest in whether repeated cold exposure can influence stress responses and other physiological adaptations.

But this is an area where the marketing has moved considerably faster than the evidence.

Don’t turn an interesting hypothesis into a medical fact.

AND WHAT ABOUT THE “INFLAMMATION” CLAIM?

This is another classic wellness trap.

Inflammation is not simply the enemy.

Exercise creates an inflammatory response.

That response is part of the body’s response to training.

So:

“Cold reduces inflammation”

isn’t automatically equivalent to:

“Cold improves adaptation.”

Sometimes reducing inflammation and discomfort is useful.

Sometimes the inflammatory response is part of the process you actually want.

The question is always:

Inflammation where, when, why and for what outcome?

That’s precision health.

SO WHAT SHOULD YOU ACTUALLY DO?

Instead of blindly following the recovery trend of the month:

STRENGTH / HYPERTROPHY DAY

Prioritise:

Sleep

Nutrition

Protein

Hydration

Active recovery

Appropriate training load

And if muscle growth is the priority, don’t make an immediate ice bath your automatic post-workout ritual.

HARD CONDITIONING / ENDURANCE

Cold immersion may have a different role depending on the training objective and when you need to perform again.

TOURNAMENT / MULTIPLE-EVENT ATHLETE

Short-term recovery can become more important than maximising adaptation from one individual session.

That’s where CWI may have a legitimate place.

REST DAY

If you enjoy cold exposure and tolerate it well, there is less reason to worry about interfering with the adaptation from an immediately preceding strength session.

SAUNA

Use it because you enjoy it, because it helps you relax, because it forms part of your recovery routine — and because the emerging cardiovascular evidence is interesting.

Not because you’re “sweating out toxins.”

THE WELLVIA RULE

There is a simple principle we use at Wellvia:

DON’T ASK WHETHER SOMETHING IS TRENDY.

ASK WHETHER IT IS RIGHT FOR YOU.

An ice bath isn’t inherently good.

It isn’t inherently bad.

A sauna isn’t a miracle treatment.

And neither belongs in everyone’s programme simply because Instagram says it does.

The intervention has to match the objective.

Build muscle?

Don’t unnecessarily interfere with adaptation.

Recover for another performance tomorrow?

The calculation changes.

Want a relaxing heat ritual?

Sauna may be a great option.

Trying to “detox”?

Start by understanding what your liver, kidneys, lungs and gastrointestinal system already do.

And if somebody is selling you a £10,000 ice bath by promising that it will “optimise everything”…

Ask them a very simple question:

“Optimise what?”

Because the answer should come before the intervention.

THE BOTTOM LINE

The ice bath isn’t the scam.

The one-size-fits-all marketing is.

Cold exposure has real physiological effects.

Sauna has real physiological effects.

But neither is a substitute for the boring fundamentals that actually underpin health:

Training.

Nutrition.

Sleep.

Recovery.

Stress management.

Consistency.

The wellness industry loves the frontier.

At Wellvia, we’re interested in something slightly different:

Using the right intervention, for the right person, at the right time, for the right reason.

That’s the difference between wellness theatre and personalised health.

References

1. Laukkanen T, Khan H, Zaccardi F, Laukkanen JA. Association Between Sauna Bathing and Fatal Cardiovascular and All-Cause Mortality Events. JAMA Internal Medicine. 2015;175(4):542–548. doi:10.1001/jamainternmed.2014.8187. (JAMA Network)

2. Roberts LA, Raastad T, Markworth JF, et al. Post-exercise cold water immersion attenuates acute anabolic signalling and long-term adaptations in muscle to strength training. The Journal of Physiology. 2015;593(18):4285–4301. doi:10.1113/JP270570. (The Physiological Society)

3. Machado AF, et al. The Effects of Regular Cold-Water Immersion Use on Training-Induced Changes in Strength and Endurance Performance: A Systematic Review with Meta-Analysis. Sports Medicine. (PubMed)

4. Zhang Y, et al. Effects of post-exercise cold-water immersion on resistance training-induced gains in muscular strength: a meta-analysis. Frontiers in Physiology. 2022. (PubMed)

5. Dupuy O, et al. Effects of Cold-Water Immersion Compared with Other Recovery Modalities on Athletic Performance Following Acute Strenuous Exercise in Physically Active Participants: A Systematic Review, Meta-Analysis, and Meta-Regression. Sports Medicine. (PubMed)

6. Baker LB, et al. Physiology of sweat gland function: The roles of sweating and sweat composition in human health. Temperature. 2019. (PubMed)