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Originally Posted by Selmanito  According to the book above, fitness athletes and bodybuilders etc train so hard to achieve high fitness levels and always aim for the best nutrition, yet still only live just as long as the average person. |
Bodybuilders generally don't train for high fitness levels; their primary goal is getting their desired physique. This often involves steroids, hgh, and extreme dieting, both in the off season where they typically put on excess fat to maximize muscle gain, as well as leading up to the contests where they diet down to unsustainable levels of bodyfat in order to look good for the day or two they are being judged.
Also, bodybuilders carry more mass on their frames. I just wiki'd Ronnie Coleman (8 time mr olympia), and his weight varies between 296 and 325 pounds, at 5'11. According to BMI, he is morbidly obese.
Also, best nutrition is subjective, but I'm sure many people on this site choose to be vegitarian or vegan partially because of health reasons. There are very few vegitarian bodybuilders ... again, their diet is designed to meet their goals of packing on muscle, which doesn't have to equate to being healthy.