The first 24 hours after knee surgery
Rehab begins as soon as you're back in your hospital room. Your rehabilitation program will help you regain strength, balance, and range of movement in your knee. This program will be designed specifically for you and may include a machine called a "continuous passive motion" machine that gently straightens and bends your knee to help reduce stiffness. Other exercises that promote blood flow to your legs include ankle pumps and pedaling your feet.
Getting up and around soon is important. In fact, you'll probably be asked to stand as quickly as 24 hours after surgery. If you had considerable pain before surgery, you most likely cut back on your activities, so your leg muscles may be weak. You’ll need to build up enough strength to control your new knee, and early activity encourages healing, too. Your doctor and physical therapist will give you specific instructions on wound care, pain control, diet, and exercise.