If you're a candidate for a knee replacement--or perhaps have already had a knee replaced--you know it's serious surgery. Pain and mobility issues usually dictate that it's time for the procedure. Recovery is always of primary concern. The goal for you, as the patient and as a runner, is being able to resume as many of the activities you were performing before the surgery as soon as possible. Unfortunately, running isn't recommended.
History
The first knee replacement was performed in 1968, according to the American Academy of Orthopaedic Surgeons, and the procedure is considered to be one of the more important orthopedic surgical advances of the 20th century. Through the decades since then, advancements have been made in the materials and techniques used in total knee replacement surgery to greatly increase its effectiveness and enable more post-op activity. In the United States each year, more than 580,000 knee replacement operations are performed.
Function
During surgery for a total knee replacement--also known as knee arthroplasty--the doctor will cut away damaged cartilage around the knee joint and bones. An artificial joint made of metal and plastic will then be fitted into the bone. You and your doctor will be able to choose from a variety of designs to find one that will suit you, taking into account your gait, your build and other health factors. Expect the surgery to take about two hours.
Recovery
Expect to spend three to six weeks recovering from knee replacement surgery. At that point, you can resume most normal daily activities. You should be able to drive, providing you can bend you knee properly and you have enough muscle control to operate the necessary pedals. Your doctor will encourage you to walk as much as possible, at least 30 to 40 minutes four days per week.
Low-impact Exercises
Be prepared to change your lifestyle to include low-impact exercises that will reduce the stress on your joints after your knee replacement surgery. Walking, using an elliptical trainer, climbing on a stair machine, dancing, golf and cycling are all recommended, along with any exercises your physical therapist may prescribe. Weight lifting is allowed, but when working out your lower body, it is best to use less weight and more reps. Working out the upper body should be done while seated or lying down. Swimming and water aerobics are especially good and you can begin that as soon as your wound is healed.
High-impact Exercises
The bad news for runners is that high-impact stress on your new knee is not recommended. According to the American College of Sports Medicine, doctors in a biomechanical investigation found the artificial joint cannot handle high-impact sports. Tennis, squash, racquetball, skiing, jogging and running are out as acceptable post-knee replacement activities. These sports put the joint at risk. You also should not do any heavy lifting that will more pressure on the knee. When in doubt about any activity, consult your doctor first.
