Exercise recommended: read a WW II memoir, for example With the Old Breed or Crossing the Line. Consider the constant dangers these guys faced and lived through, in combat or simply working on a flight deck. Then look at the bodies. The men are fit, with low body fat and good muscle tone. They are not "ripped". They do not have biceps like cantaloupes.

So excuse me if I'm not impressed with the arguments at AoM.