Well, just as ships are made for sailing, planes for flying and engines for running, so are our bodies. Regular organized exercises keep the body well balanced for every good work.OK, well, I'm not running much these days - but last month I did a ski simulator (like a Nordic Track) quite regularly. Amway. I was also doing a dumbbell regiment - usually with 20 pound ones. Well, not much - but good enough for my thin size.