Sutures may or may not have been used to close the wounds. Your doctor will instruct you when you may remove the bandage, usually within a day or two (depending on the procedure), leaving smaller dressings over the actual incisions. Your doctor will let you know how long to wait before you can get your knee wet, but in general, do not get your knee wet until the sutures are removed. You will need to cover the leg with a large plastic bag when bathing, to keep the incision dry for the first week to 10 days.
While lying on your back, bend your knee as you slowly slide the heel of your operated leg up toward your buttock. Slide as far back as you can and hold for five seconds. Slide back to the starting position and repeat again.
While lying on your back on the floor, try pressing the back of your knee flat against the floor. Hold for 10 seconds and release. Repeat regularly.
This is an excellent set of exercises that can strengthen all the muscles of the upper leg. There are four different straight-leg exercises to strengthen the four sides of the upper leg.