Should You Do Hot or Cold Therapy First?

Understanding what contrast therapy is helps explain why the order even matters here. For a typical home infrared sauna and cold plunge routine (known as contrast therapy), do heat therapy first, then cold. This is the common sequence lots of folks use, but research doesn't prove that any specific order is universally better.

Online advice is split on whether doing hot or cold exposure first offers superior benefits. People confidently state both sides, and in the end, it mostly comes down to personal preference. Regardless of which one you start on, the practice often switches back and forth between the two multiple times per session.^1,2

This guide will cover the standard sequence of contrast therapy and discuss when cold-first makes sense. We'll also touch on the transition most people rush and how your training goal may change the answer.

Why Heat-First Is the Common Sequence

Though more research is needed, a 2025 randomized controlled trial ran three cycles of 10 minutes in a sauna followed by a cool-down. Healthy participants tolerated it well.³ This is a big reason why heat-first is a common sequence for contrast therapy.

What Each Phase Is Doing

When figuring out whether to do hot or cold first (or which one to end on), it can help to know the physiological basics of what each phase is actually doing^4,5:

• Heat phase – With heat exposure, blood vessels dilate (known as vasodilation), increasing blood flow to the area, tissue in the body warms, and muscles loosen into relaxation as the body settles into the routine.
• Cold phase – Cold causes blood vessels to constrict (vasoconstriction), which may help reduce inflammation and swelling. The brief exposure may leave you feeling alert and refreshed.

So, some people see heat as the phase that opens the session and cold as the invigorating finale.

Why the Order Isn't Settled Science

The heat-first convention is partly based on the available research (like the study mentioned above). But it also comes from standard practice and sauna culture.

Science hasn't confirmed the optimal order, and it may never get there. Also, many people alternate between hot and cold for a few cycles per session. So it's more about contrasting hot and cold therapy for pain relief than following one fixed order.⁶

The Beginner Heat-First Sequence: 5 Steps

Here's what a beginner-friendly sequence might look like when you start with heat:

• Step #1 – Heat for five to 10 minutes in a sauna, warm bath, or hot shower.
• Step #2 – Step out and pause 30 to 60 seconds so your breathing settles.
• Step #3 – Cool down for 30 to 60 seconds with a cool shower or cold plunge.
• Step #4 – Rest at room temperature for several minutes.
• Step #5 – Repeat once or twice if you feel well and are up for it.

The Transition Everyone Rushes

The pause between heat and cold is the most-skipped step. But it's arguably the one that matters most for how the session feels.

To avoid "cold shock," don't jump directly from very hot conditions into icy water. Always enter cold water slowly, keep your head and neck out the whole time, and control your breathing.^7,8

Scaling Up as You Adapt

Knowing how to do contrast therapy at home makes it easy to start with what you've got. You don't need a sauna or an ice-cold plunge to do hot/cold contrast therapy. A hot bath followed by a cold shower works just fine. Or even a hot shower finished with 30 seconds on the cold-water setting.

That said, you can scale up as you get more comfortable. Progressing might look like 10 to 15 minutes of heat followed by 30 to 90 seconds of cold. Knowing how often you should do contrast therapy helps you pace that increase, and you may go from one or two weekly sessions up to three. Eventually, you might want to upgrade your home setup with an infrared sauna and ice bath.

When Cold First Makes Sense

Pain management often calls for a different approach than general recovery. A whole-body recovery session is a different job from treating one swollen area or sore, stiff leg muscles.

Targeting a Specific Injury or Acute Swelling

Cold-first routines are sometimes used as a treatment for a specific injury or to reduce acute swelling. Keep in mind, though, these aren't the usual whole-body sauna contrast protocol.^9,10 They're a different tool, targeted at the affected area, for a different purpose.

Understanding whether contrast therapy is good for you matters here too. In any case, treat this as complementary guidance and always check with a healthcare provider before starting, especially if you have a recent injury or a known medical condition. They can tell you whether it's safe and offer personalized guidance on the order and duration.

Reading Conflicting Advice Online

It's highly possible you've seen cold-first recommended confidently when researching online. Sports contrast-bath protocols and post-injury routines may get blended with general wellness advice on the internet.

There's no right or wrong answer. However, if you're looking for specific guidance, here it is:

• For a whole-body recovery session, do heat first. 
• For a specific swollen or injured area, you might get a cold first. But that's a clinical call your healthcare team can make.

How Your Training Goal Changes the Answer

When should you do hot or cold therapy first based on your exercise routine? The sequence isn't really the variable here. It's about timing relative to the workout.

If You Lift for Strength or Size

For those lifting heavy weights or doing full-body resistance training, it's best to avoid cold immersion right after, especially an extended ice-bath session. More research is needed, but some evidence suggests that frequent, immediate cold exposure may interfere with training adaptations.^11,12

If You Run or Train Endurance

Contrast therapy can be particularly effective after endurance work, such as distance running, technical hikes, bike rides, or races, where soreness tends to build up. People often do heat-first in this scenario, but it's really up to the individual.

Safety Notes for Switching Temperatures

A few safety precautions to keep in mind:

• Never cold-plunge alone, especially outdoors or in extremely cold temps.
• Stop the session if you experience chest pain, faintness, severe dizziness, unusual shortness of breath, confusion, or heart palpitations, or general discomfort, especially if symptoms persist.
• Heat-and-cold cycling can place meaningful stress on the cardiovascular system. Be aware of this, particularly if you have a known medical condition.

None of this is medical advice, so consult a clinician first if you have heart disease, an arrhythmia, uncontrolled blood pressure, circulation problems, other cardiovascular issues, or are currently pregnant.

Build a Sequence You'll Actually Stick to, with Lifepro

Many people wonder if they should do hot or cold therapy first when starting out with contrast therapy. Heat first tends to be the more common default. However, the choice is personal, and the sequence you'll stick with consistently is the way to go.

Remember, moderate temperatures and an unhurried transition serve most people better than chasing extremes. Having a sauna and cold therapy equipment on hand, such as a recovery ice bath, is what makes the pause between phases easy instead of awkward, which is where routines usually break down.

Our recovery equipment is designed to provide the full heat-to-cold cycle at home, on your schedule, making it a valuable tool for staying consistent. Check out the lineup to see what's easiest to integrate into your wellness routine and lifestyle.

Sources:

1. PLOS One. Contrast Water Therapy and Exercise Induced Muscle Damage: A Systematic Review and Meta-Analysis. https://journals.plos.org/plosone/article?id=10.1371%2Fjournal.pone.0062356
2. Database of Abstracts of Reviews of Effects (DARE): Quality-assessed Reviews [Internet]. A systematic review of the effectiveness of contrast baths. https://www.ncbi.nlm.nih.gov/books/NBK77340/
3. Scientific Reports. Acute Finnish sauna heating and cold water immersion effects on cardiovascular dynamic response in normotensive women. https://www.nature.com/articles/s41598-025-29035-w
4. European Journal of Applied Physiology. Human physiological responses to immersion into water of different temperatures. https://link.springer.com/article/10.1007/s004210050065
5. Sports Medicine - Open. Effects of Post-Exercise Heat Exposure on Acute Recovery and Training-Induced Performance Adaptations: A Systematic Review. https://link.springer.com/article/10.1186/s40798-025-00910-0
6. Journal of Rehabilitation Medicine. Effect of cold and heat therapies on pain relief in patients with delayed onset muscle soreness: A network meta-analysis. https://medicaljournalssweden.se/jrm/article/view/331
7. Journal of Thermal Biology. Habituation of the cold shock response: A systematic review and meta-analysis. https://eprints.bournemouth.ac.uk/39259/9/1-s2.0-S0306456523003169-main.pdf
8. National Center for Cold Water Safety. Cold Shock. https://www.coldwatersafety.org/cold-shock
9. British Journal of Sports Medicine. Soft-tissue injuries simply need PEACE and LOVE. https://bjsm.bmj.com/content/54/2/72
10. Database of Abstracts of Reviews of Effects (DARE): Quality-assessed Reviews [Internet]. The use of ice in the treatment of acute soft-tissue injury: a systematic review of randomized controlled trials. https://www.ncbi.nlm.nih.gov/books/NBK70552/
11. Sports Medicine. The Effects of Regular Cold-Water Immersion Use on Training-Induced Changes in Strength and Endurance Performance: A Systematic Review with Meta-Analysis. https://link.springer.com/article/10.1007/s40279-020-01362-0
12. The Journal of Physiology. Post-exercise cold water immersion attenuates acute anabolic signalling and long-term adaptations in muscle to strength training. https://espace.library.uq.edu.au/view/UQ:367488