You start to get permanent changes and decreased ability to repair cartilage and tissue.
Tendons are less flexible, so more stretching and warming up is required.
Knees are especially vulnerable, as they take a lot of stress from high impact activity. The best way to avoid sports injuries are to keep your weight down, focus on low impact activities, and add exercises for flexibility. That is why it is essential for runners to either rest or do cross-training, such as biking or swimming, on alternate days, advises Larson. Weight training is also an excellent activity to help maintain strength and muscle mass. Although aging is inevitable there are things that you can do to slow down or stop the bodily wear and tear that accompanies aging.