You may not be allowed to bear weight on your operated leg for several days or weeks, and your knee will likely be locked straight in a brace. It usually takes 2–6 weeks before you can walk unaided and take your full weight on the operated leg. You may not be allowed to bear weight on your operated leg for several days or weeks, and your knee will likely be locked straight in a brace. It usually takes 2–6 weeks before you can walk unaided and take your full weight on the operated leg.