By and large, if we take reasonably good care of ourselves, most of the so-called degenerative illnesses–heart disease, cancer, diabetes–usually wait until we’re in our sixties or so. So just accept the following as a given: Before age 60, most medical problems will involve your musculoskeletal systems. Which I guess is why the waiting rooms of chiropractors and osteopaths are so crowded. If to stay healthy we keep active, and by active, I mean anything from taking a regular walk to winning bowling trophies, we will inevitably experience some muscle aches and pains.