Ok, just google info on genetic variation in IQ and look at the standard deviation groupings within a bell curve.
THAT will give you a good idea of my position on human variance and frequency
The variance in height is accounted for.
So that kind of takes care of that. Why would you concern yourself anyways with the 0.01 percent of musculature in either direction? Why not focus on the aggregate of what is possible. That means more than having what is known as an argument around the margins.
Even if there was one person 230 lbs at 4 percent at 5`11 drug free (there isn`t), but lets just say there was. What bearing does that have on the rest of the billions of people on earth? None.