Any "Obsessive Exercisers" Out There?

A New York Times article reports that, "While most Americans remain sadly sedentary, there is a small group of active people for whom exercise becomes something of an obsession, pursued despite physical injuries, damaged relationships and time stolen from work, family and social activities."

The Times' explanation of the optimal amount of exercise one should get:

"Aerobic activity that burns 2,000 to 3,500 calories a week is considered the amount of exercise to attain and maintain optimal health. This would entail 40 to 60 minutes of cardiovascular exercise four to six times a week. Beyond that, there are no added health benefits, but there is an increased risk of exercise-induced injuries."