People with bad knees who do have a need for exercise can do low-intensity aerobic exercise and training that strengthens the muscles around the knee joint, such as swimming and bicycling.
1. Low-intensity aerobic exercise: people with bad knees should avoid climbing mountains, jumping rope, playing basketball, marathon and other sports, but can do some low-intensity aerobic exercise, such as swimming, cycling, water running and so on.
2. Muscle strength training around the joints: people with bad knees can strengthen the muscle strength of the knee to meet the demand for exercise, and can stabilize the joints, so that the joints are not easy to be injured, the more common exercise methods are straight leg raising and squatting against the wall, these exercises can help strengthen the quadriceps muscle strength.
If you have a bad knee but have the need to exercise, you can ask a professional rehabilitation therapist to choose the right exercise.