[Alex3917]

> The Rock has a BMI of 31 (260lbs at 6'5") which is classified as obese

Why shouldn't he be classified as obese? If he was that heavy because he was working out then that would be one thing, but the reason he's that heavy is due to using steroids to put on low quality muscle mass. I don't see why that would be any less unhealthy than just sitting around eating doughnuts or whatever.

[adrianN]

If it were as unhealthy as eating donuts (which you would need to prove), it would most likely be unhealthy by a different mechanism. So it would make sense to distinguish this if you want to find out what causes illnesses.

I also don't understand what you mean by "low quality muscle mass".

[Alex3917]

> I also don't understand what you mean by "low quality muscle mass".

Muscle with a low weight to power ratio, and/or with an unfavorable type I to type IIa/b ratio. E.g. you can quickly bulk up by lifting 3 x 3 at a high weight (or whatever Starting Strength recommends), but you're going to develop much lower quality muscle than if you just do 6 x 10 or whatever in terms of power. And similarly if you're not doing cardio in at least 90 minute increments then on a regular basis then your type II muscles aren't going to be able to properly utilize fat, because they'll never get past the point of just relying on stored glycogen or whatever.

[random_rr]

Would you mind explaining "low quality muscle mass"? That doesn't seem like a real thing. Do you know how steroids typically work? They allow you to work out more and recover quicker. You're putting on "real" muscle, just faster than you could un-aided.

[geoka9]

> They allow you to work out more and recover quicker.

They also act as anabolics, so you could argue that the muscle mass gained due to their anabolic effect is "low quality" (that's not what I'm doing, though).