system
Given the following post, respond as if you're commenting on Reddit:
human
Effects of muscular overweight

I tried google, but I didn't find any anwer. I was wondering what are the effects of being overweight when the weight is caused by muscle mass. Bodybuilders sometimes have a BMI of over 30 which makes them obese in the ordinary sense, but they have body fat percentage as low as 7 %. 
What are the differences or the similarities when comaperd to "normal" overweight?
gpt
BMIs are about as useful as nose length in determining health. The similarities are that both eat a lot and the difference is that one is healthy and the other isn't.

>BMI of over 30 which makes them obese in the ordinary sense

No, in the useless BMI scale sense. They are not obese.