What is the definition of "exercise" though? Running marathons and tens of miles a day? I never said that sedentary lifestyle is good, but more (when it comes t

What is the definition of "exercise" though? Running marathons and tens of miles a day? I never said that sedentary lifestyle is good, but more (when it comes to exercise and anything) is not necessarily better. Strength exercise is nice, but my concern with it is increased caloric needs (due to increased basal metabolic rate) and also - growth factors such as IGF-1. When I see people jogging next to cars exhausts for "health" here in Orange County under the skin-burning sun, I really get the feeling that most people are out of their minds nowadays.