Pre-surgery physical therapy for knee replacement: prehabilitation to recover faster
- Ricardo Vargues - Fisioterapeuta
- Jun 27, 2023
- 4 min read
Updated: Mar 27
If you’re moving forward with a total knee replacement (arthroplasty), there’s something you can do before surgery that often changes the recovery: go into the operating room stronger, more mobile, and with a clear plan.
This is called prehabilitation — preoperative physical therapy focused on strength, mobility, pain control, confidence with walking, and practical preparation (including your home setup). Evidence suggests improvements in pain/function and physical capacity, although results vary depending on the program and each person’s profile.
Already had surgery? See also: Physical Therapy After Knee Replacement.
What is prehabilitation before knee replacement surgery?
Prehabilitation is a pre-surgery physical therapy program for knee replacement designed to improve your physical condition: more strength (especially in the quadriceps and glutes), improved range of motion, better walking tolerance, and greater independence during the first weeks after surgery.
In practical terms, it’s not “a gym session to suffer through” — it’s guided, safe, progressive training, adjusted to your pain levels, osteoarthritis, and your real-life limitations.
Benefits of pre-surgery physical therapy for knee replacement (what it can actually improve)
A well-designed program, with good adherence, tends to help with:
Strength and function before surgery (walking, sit-to-stand, stairs).
Better progress in the first weeks/months of recovery for many patients.
Education and more realistic expectations, reducing anxiety and increasing confidence in the process.
But with clinical honesty: some studies found that certain multidisciplinary pre-op programs did not show a clear advantage in specific outcomes (it depends on the program design, the patient’s profile, duration, and context).
When does it make sense to start?
Ideally, 4 to 8 weeks before surgery (or as soon as surgery is recommended and you have a likely date). Even with less time, you can still gain:
Better pain control.
Mobility routines.
Gait/stairs training and practice with assistive devices (crutches, walker).
Home preparation (this alone can reduce post-op stress).
Practical pre-op physical therapy plan (what I do in “real life”)
1) Assessment and (realistic) goals
In the first session, the goal is to measure and define: pain, mobility, strength, gait, weight-bearing tolerance, balance, and the tasks that limit you most (e.g., stairs, getting in/out of the car, getting up from the couch).
2) Strength that protects the knee (and speeds up post-op recovery)
The “core” usually includes:
Quadriceps (controlled knee extension, isometrics, sit-to-stand).
Gluteus medius and gluteus maximus (pelvic stability).
Posterior chain (hamstrings/calves), depending on the case.
The goal isn’t to “become an athlete” — it’s to reach surgery day with muscles that are ready to respond and can work right away after surgery.
3) Knee mobility (gaining degrees with good judgment)
We work on flexion/extension within your tolerance to:
Reduce stiffness.
Make walking easier.
Prepare the knee for the post-op phase (when mobility work is done daily).
4) Fitness and walking tolerance
When possible, we add low-impact cardio (e.g., stationary bike, paced walking). A better “engine” helps with fatigue and independence.
5) Functional training (what you’ll actually need at home)
Getting up/sitting down from real chairs (your chair).
Bed/couch transfers.
Building stairs.
Training with crutches/walker (if expected), so you don’t have to “learn from scratch” after surgery.
6) Education and a recovery plan
Modern preparation focuses on:
Knowing what’s “normal” vs. a red flag.
How to pace your effort.
How to manage swelling and stiffness with simple strategies.
And what to do to stay consistent (without magic promises).
Preparing your home (a surprisingly valuable detail)
An often underestimated part of prehabilitation is reducing friction after surgery:
Remove loose rugs and obstacles.
Make sure there’s a clear path to the bathroom/bedroom.
Have a sturdy chair at an appropriate height.
Consider shower supports (as needed).
Set up a simple “exercise zone."
How I can help (in-home physical therapy in Lisbon)
If you’re in Lisbon (and nearby areas), I can create an in-home prehabilitation plan built around three pillars:
A clear, progressive plan with measurable goals (less pain, better function).
Sessions adapted to your home (stairs, chair, bed, routine) — reducing barriers and improving consistency.
Coordination with your clinical context (respecting medical guidance and any limitations).
👉 If you’d like, we can schedule an assessment and I’ll tell you—based on your case—what’s most worth training right now (and what’s a waste of time).
Conclusion
A knee replacement can give you your quality of life back — but recovery tends to feel much more manageable when you go into surgery with strength, mobility, confidence, and a plan. Preoperative physical therapy (prehabilitation) doesn’t promise miracles: it promises smart preparation, consistency, and better odds of a smoother post-op process.
Schedule your assessment, and let’s start working now — in the comfort of your home.
Frequently Asked Questions (FAQ)
What is prehabilitation before knee replacement?
It’s physical therapy before surgery to improve strength, mobility, walking ability, and practical preparation for the post-op period.
When should I start preoperative physical therapy?
Ideally 4–8 weeks before, but even with less time you can still improve pain control, build a mobility routine, and prepare your home.
How many sessions do I need?
It depends on your starting point and how much time you have before surgery. The most important thing is a plan that’s simple, progressive, and realistic to stick to.
Does prehabilitation guarantee a faster recovery?
It can improve your odds (strength/function and a better “start”), but it’s not a guarantee—results vary, and some studies show neutral effects for certain outcomes.
Can I do in-home prehabilitation in Lisbon?
Yes. In-home sessions let us train in your real-life context (stairs, chair, bed) and reduce barriers to consistency.
Ricardo Vargues | Physiotherapist
References:
Systematic review & meta-analysis (TKA): JOSPT (2022).
Systematic review (TKA/THA): Adebero et al., 2024 (PubMed).
Randomized clinical trial: Nguyen et al., JAMA Network Open (2022).
ERAS® Society consensus (hip & knee replacement): Wainwright et al., 2020.
Systematic review & meta-analysis (preop exercise/education): Moyer et al., 2017 (PubMed).
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