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Prehab: Preparing Your Body Before Orthopedic Surgery
Prehab means strengthening and preparing your body in the weeks before surgery instead of waiting to start rehab after. In studies of patients heading into knee replacement, those who did prehabilitation went into surgery stronger and reported less pain and better function in the early months afterward. Surgery takes the same course either way; the stronger you go in, the more strength and function you keep on the other side.
If your surgery is a few weeks out and you’re wondering whether there’s anything worth doing besides waiting, this is it. Prehab is the one part of your recovery you can start today, and the version most people need is simpler than the name suggests.
What prehab actually is
Prehabilitation is a short program — usually a few weeks — of targeted exercise and preparation before a planned surgery. For orthopedic procedures like knee or hip replacement, it typically includes:
- Strengthening the muscles around the joint being operated on, especially the quadriceps for knee surgery
- Range-of-motion and mobility work, within what your joint allows
- Education — learning what recovery will look like, what equipment you’ll need, and what the first two weeks at home actually involve
- Practical preparation — setting up your home, arranging help, and getting your recovery equipment lined up before you need it
The logic is plain: surgery temporarily takes strength and mobility from everyone, so it helps to start with more of both.
What the evidence says — honestly
A 2024 meta-analysis of 28 randomized trials found that patients who did prehabilitation before total knee arthroplasty showed meaningfully better strength going into surgery, and better function, less pain, and better mobility in the period after it.[1] The effects were moderate — real, but not dramatic — and the authors were candid that many of the underlying trials had quality limitations.
Two honest caveats belong here. First, the evidence on whether prehab shortens your hospital stay is mixed — some reviews find a benefit, others don’t.[2] Second, most of the research is on knee replacement; the evidence for hip replacement is thinner. So the fair summary is: prehab reliably helps you go in stronger, it’s linked to less pain and better function early in recovery, and it has essentially no downside — which is why many surgical teams now build some version of it into their pre-op process.
What a simple prehab window looks like
You don’t need a boot camp. A realistic countdown, guided by your surgeon or physical therapist:
| Weeks out | The focus |
|---|---|
| 6–4 weeks | Start the strength program (quad sets, sit-to-stands) — get the specific exercises from your PT |
| 4–2 weeks | Keep training · manage swelling and soreness after sessions · arrange help for week one |
| 2–1 weeks | Home setup done · equipment ordered and delivered — walker, cold therapy system |
| Final days | Don’t cram — rest · confirm your ride home · recovery station stocked and ready |
Underneath that calendar, the program itself covers three things:
Strength. A few sets of targeted exercises most days — for knee surgery, that’s usually quad sets, straight-leg raises, sit-to-stands, and gentle step-ups, adjusted to what your joint tolerates. Sore is acceptable; sharp pain is not.
Swelling and pain control. If your joint is swollen and irritable before surgery, it limits how much strengthening you can actually do. Managing that — activity pacing, elevation, and cold therapy after exercise — keeps the joint quiet enough to train. This matters most before procedures like ACL reconstruction, where surgeons often want swelling settled and motion restored before they’ll operate.
Logistics. Line up what recovery needs before you’re recovering: your home setup, a ride home, help for the first week, and the equipment you’ll use daily — walker, ice or cold therapy system, raised toilet seat if advised. Patients who arrange this before surgery start recovery on day one instead of spending it problem-solving.
Where cold compression fits before surgery
Cold therapy isn’t just a post-op tool. In the prehab window it has two jobs: calming an irritable joint after strengthening sessions so you can keep training, and — just as practically — being in your home before surgery. Most patients who use a cold compression system rent it ahead of their surgery date so it’s ready the moment they’re home, which is exactly when swelling and pain peak. In a survey of 2,060 WRS Group patients using cold compression therapy, 75% reported real pain relief and 70% reported using fewer opioids.[3]
Getting set up
WRS Group provides cold compression therapy to surgical patients across the US, and most arrange their rental before surgery so recovery starts the day they’re home. Ask your surgeon about prehab and about cold compression therapy — many practices already work with us — or reach out to WRS Group directly.
Frequently asked questions
Does prehab before surgery actually work?
For knee replacement, randomized trials show patients who do prehab go into surgery stronger and report less pain and better function in early recovery. The effects are moderate and the research quality is mixed — but the downside is essentially zero, which is why many surgical teams recommend it.
How long before surgery should I start prehab?
Most programs run 4–6 weeks before the surgery date. Even a shorter window helps more than nothing. Ask your surgeon or physical therapist to tailor the exercises to your joint and your procedure.
What exercises should I do before knee replacement?
Typically quad sets, straight-leg raises, sit-to-stands, and gentle mobility work — adjusted to what your knee tolerates. Get the specific program from your surgical team rather than a generic list; the right dose depends on your joint.
Can prehab shorten my hospital stay?
The evidence is mixed — some studies find prehab patients go home sooner, others find no difference. The more consistent benefits are strength going in and function and pain in the weeks after.
Should I use ice or cold therapy before surgery?
Cold therapy after prehab exercise can help keep an irritable joint quiet enough to keep training, and it’s standard for pre-op swelling control before procedures like ACL reconstruction. It’s also worth arranging your post-op cold therapy system before surgery so it’s home when you are.
References
- Adebero T, et al. Effect of prehabilitation exercise on outcomes following total joint arthroplasty: a systematic review and meta-analysis of randomized controlled trials. Disability and Rehabilitation. 2024;46(24):5771–5790. PMID: 38349251. (28 RCTs; significant improvements in strength, function, pain, ROM, mobility, and quality of life for TKA prehab; authors note high risk of bias in 24 of 28 trials.)↩︎
- Evidence on length of stay is inconsistent across systematic reviews — some report reductions, others no significant difference. ⚠ [Fact-check pass: confirm the two reviews cited internally — Frontiers in Medicine 2025 meta-analysis (no LOS effect) and Chesham & Shanmugam 2019 (LOS reduction) — before naming either in-page.]↩︎
- WRS Cold Compression Scores — patient-reported outcomes survey, n = 2,060 (WRS Group internal data, 2026).↩︎
Questions about preparing for surgery?
Our team helps patients, caregivers, and surgeons with cold compression therapy every day — tell us what you need and the right person will get back to you.