It is reasonable not to attempt risky movements that may lead to injuries but putting most of the body’s pressure to the targeted knee joint, it is quite possible to perform several low-risk exercises that enhance knee range of motion. Of these, one is the full range of motion split squat, carrying out maximum work in the knee extensors and flexors and also hip flexors which are put on stretch. This may reduce quite a bit the ill effects that may arise in persons who remain seated for a long time. However one might begin with the lowest levels starting with supports such as railings or an elevating front foot, and then progress as required. Also, it would be wise to first talk to their healthcare provider or an experienced trainer to hear their views in case it is planned to embark on a new exercise regimen, especially when there are some knee problems previously experienced.