Meatheads!

One thing needed on this bastard of a planet is copious heaps of pure muscle, and the Meatheads have perfected the art of getting ripped. Their extreme training regimens handed down through generations can turn your average scrawny nobody into a brickhouse Adonis at incredible rates, amazingly without having to rely on dangerous chemicals that have led others down dark paths into maddening hugeness. They're not the brightest, but when you're crushing engine blocks on your forehead like beer cans something silly like graduating high school is of little concern.