Guess this goes out to the DI ers because you can be broken down and still play randomly.Then again players like TD enjoy physical activities like tennis and others. Most problem that arrived in later life is arthritis stiffness in your joints.But now we have great natural supplements like MSM, Chondroitin, Glucosamine, turmeric and fish oil. Now for tendon and ligament upkeep we have an enzyme that will help collagen to repair itself. So enjoy life as you get older. When you are healthy life is better!