Updated Jan 30, 2021 | 06:15 IST Regular physical exercises are crucial to strengthen the muscles around the knee, making the muscles more flexible and strong, protecting the new knee and other joints as well. Underwent total knee replacement surgery? 7 self-rehabilitation exercises you can do to improve flexibility  |  Photo Credit: iStock Images Key Highlights Every small activity of a human body affects the knee, be it a simple walk, sitting for long hours or just going for a run Medical science has evolved considerably to ensure the knee joint can be replaced Procedures like knee grow ensure that the process is fairly painless and simple, helping improve the quality of life even in old age