Yet by all accounts, dosage is no less relevant to exercise than to any other medical treatment, and for years the endurance-athletics movement has prompted words of caution from none other than Kenneth Cooper, the Dallas physician widely credited with launching the aerobics movement nearly half a century ago.
Despite the intense grief, Vallely knew that pursuing the best possible treatmentfor his daughter and following doctors orders to exercise and maintain a positive outlook, while remaining true to his duties as a husband, father and businessman, was the only choice he had.