Some days when I get to the gym and start working out, I wonder: "Am I getting too old for this?" Then my logical part says: "The older I am, the more important cardiovascular exercise and weight training become." And then I tell myself: "I will feel better after the workout." "I will be more comfortable about what I am going to eat later because the exercise will speed up my metabolism and I will burn up the calories better." There were days that I used to worry that I would sweat so m...