How Cold Compression Therapy Works

Most injuries, whether from sport, surgery, or everyday wear, trigger the same response in your body: swelling, heat, and pain around the affected area. This is your body's natural defence mechanism, but left unmanaged, it can slow your recovery significantly.

Cold compression therapy addresses both problems at the same time, which is why it's been a staple of professional sports medicine and post-surgical rehabilitation for decades. It's taking RICE methodology to a new level.

What happens during a session?

1. The unit chills the water
Ice water is held in the central unit, which circulates cool water continuously throughout your session, maintaining a consistent temperature without you needing to do anything.

2. The CryoCuff delivers cold to the injury
The water flows into a specially designed CryoCuff wrapped around the affected area. Whether that's a knee, shoulder, ankle, wrist or hip. The cuff conforms to the shape of the joint, ensuring consistent contact.

3. Intermittent compression pulses
The unit intermittently inflates the cuff, applying rhythmic pressure to the injury. This mimics the body's own pumping mechanism, helping to move excess fluid away from the site and manage swelling.

4. You relax, it does the work
Sessions typically run for 20–30 minutes. You control the settings via the simple digital display, adjust to your comfort level, and let the kit do the rest.

  • Cold

    Cold alone reduces skin temperature, dulls nerve activity around the injury, and slows the metabolic rate of damaged tissue, helping to limit how much swelling develops in the first place.

  • Compression

    Compression alone applies gentle pressure to the area, encouraging excess fluid to move away from the injury site and reducing the build-up of swelling.

  • Together

    Together, they're significantly more effective than either in isolation. The compression helps drive the cold deeper into the tissue, while the cold makes the compression more comfortable to wear for longer.

"This machine has been a godsend. We were recommended to hire after my wife had a knee replacement. I went on a search and found the Isopress units. The investment has been worth every penny!! You were super easy to deal with and the unit is exactly as promoted. If you are having a surgery or need to recover from injuries etc you cant go past this unit!!"

Sean P

Verified Customer

"The Isopress cold compression machine is an absolute necessity. A game changer for recovery. If you are on the fence - please take it from a very seasoned 43 year old in knee surgeries that this is your sign to make the purchase. I promise you - you won’t regret it. To ice my knee instead of taking pain meds has been so beneficial in my recovery. I am now 17 days post op and am miles ahead in my recovery to what the expectation was."

Char S

Verified Customer

"I am a keen biker and after 2 plus hours on the bike everything is sore. Isopress ice compression kit is such a great relief for my painful foot as the summer season kicks in. The back, knee and shoulder cuffs are in use also. Fantastic product and great value"

Dave H

Verified Customer

"I had a full knee replacement February 25 and used the Isopress Cold Compression kit extensively post operation for four months. I'm a keen mountain biker, skier and hiker. This kit is fantastic and got me back on the bike in no time, skied a full season (including back country ski touring) six months after the operation and have completed five great walks / bikes within a year of the operation. I have found Brad and his crew great to deal with and would highly recommend Isopress."

Mark A

Verified Customer

Who it's designed for

Post-surgery recovery

In the critical days and weeks following surgery, managing swelling is one of the most important factors in recovery speed. Cold compression is often recommended by physiotherapists & surgeons as part of post-operative care.

Athletes & active people

Soft tissue injuries, sprains, and muscle inflammation respond well to cold compression, helping you get back to training sooner without relying solely on rest.

Joint pain & inflammation

For those managing chronic joint discomfort — knees, hips, shoulders or wrists. Regular cold compression sessions can help reduce inflammation and improve day-to-day comfort.

Ready to recover faster? Shop the Isopress range.

Frequently Asked Questions

How is it different from an ice pack?

Ice packs do one thing: cold. The Isopress Kit does far more: cold and intermittent compression. The compression cycles automatically, creating a pumping effect that actively moves fluid through the lymphatic system. That fluid is what causes swelling. Clearing it is what speeds up recovery and it's the part ice packs can't do. The kit also holds therapeutic temperature for up to 60 minutes. Most ice packs are warm in 20 and then you're handling a melting mess!

Is it the same as what my physio uses in the clinic?

Same principle, yes. Cold compression is common practice in physiotherapy clinics across New Zealand. There are a range of different options, as well as hot & cold therapy - so it might not be exactly the same device.

Our kits are simple to use and cold compression only. We bring the same approach home, at a price you can own rather than rent.

Which body parts can I use it on?

The kit comes with one of six CryoCuffs: ankle, knee, shoulder, back, leg, and hand.

It has one central unit and as you want or need other cuffs, you can mix and match them. It's built for your whole active life, not just your next surgery.

When should I start using it after surgery?

As soon as your surgeon or physio gives the go-ahead. For most people that's within the first 24 to 72 hours post-op. That early window matters. Post-surgical swelling peaks at around 72 hours, and what happens in that period has a significant effect on the weeks that follow.

Check with your medical team first, but getting started early is generally the goal.

How long does each session take?

Most sessions run 20 to 60 minutes. The kit has preset functions so you don't need to time it yourself. Use it multiple times a day in the early stages of recovery, then as needed for training and maintenance.

How does it compare to renting a Game Ready?

Game Ready rental runs around $368 per fortnight. One month costs $736, and at the end of it you hand the machine back. Game Ready offer a range of different options, some far more high tech than Isopress and with a range of costs.

Isopress is $599 one off purchase. You own it, use it for every injury, every surgery, every long training block. You can mix and match cuffs, as well as share it with family.

My physio hasn't mentioned Isopress. Should I be concerned?

Not at all. Isopress is a direct-to-consumer brand and relatively new to the market. Please tell them about us!

Many physios are familiar with cold compression therapy as a category and recommend it regularly, they may just not have come across tour specific brand yet.

The underlying technology is the same principle used in clinical machines. If you're unsure, show your physio the product and ask whether cold compression therapy is appropriate for your recovery.

Is it safe to use at home without clinical supervision?

Yes. The kit is designed specifically for home use with preset safety functions including automatic cycling and timer controls. It is not a medical device and is not intended to diagnose or treat medical conditions.

Always follow your surgeon or physiotherapist's guidance on your recovery protocol, and use the kit as a complement to their advice.

I've only got one surgery coming up. Is it worth buying rather than renting?

For a single surgery, the maths still favours buying if your recovery runs longer than five to six weeks, which most joint replacements do.

Beyond that, the kit covers every future injury, every sore knee after a long ride, every training block that asks more than your body can easily clear.

Most customers find uses for it well beyond the original surgery but of course that is up to you!

Is it noisy? Can I use it at night?

The motorised pump produces a low hum during compression cycles. Most people find it easy to use while watching TV, reading, or resting.

Whether it would disturb a partner at night depends on the person, a short trial run before bed will tell you quickly.

How do I get in touch?

Email us at hello@isopress.co.nz. We're a small NZ team and we read and respond to every message.