03/03/2026
"After a Knee Replacement: Why Getting the Leg Straight Early Matters"
The first two weeks after a knee replacement set the tone for everything that follows.
This week I saw a patient just under two weeks post-op. They were up and walking — which is great — but they were walking on a slightly bent knee.
It didn’t look dramatic.
But it was making walking harder than it needed to be.
In early rehab we absolutely work on bending the knee. Flexion is important for sitting, stairs and everyday tasks.
But getting the knee fully straight is just as important — especially for walking comfortably and confidently.
When the knee doesn’t fully straighten:
• The quad doesn’t activate as well
• Walking becomes more tiring
• Swelling can persist
• The hip and lower back begin to compensate
• A protective gait pattern starts to form
Early movement habits settle in quickly.
So we focused on simple, specific work:
✔ Gentle gravity-assisted extension
✔ Quad activation with the knee fully lengthened
✔ Slower, more deliberate walking practice
Small improvements in extension made a noticeable difference to their stride and confidence.
Early rehab isn’t about doing more exercises.
It’s about doing the right things, at the right time, in the right order.
Flexion matters.
Extension matters.
And giving both the attention they deserve early on makes the whole recovery journey smoother.