The only part of the conduct of any one for which he is amenable to society is that which concerns others. In the part which merely concerns himself his independence is of right absolute. Over himself over his own body and mind the individual is sovereign.
I freak out if I go a little too long without being in the gym. For a long time it was all about getting the weight off because I was 240 pounds at my heaviest and now I'm around 175 so the majority of that weight loss was due to diet and exercise.