I have a fun theory and interesting innovation; I call it the atlas hold. Basically the notion is that you just take the maximum amount of weight on the squat rack, and you just try to unrack it with your shoulder and your legs, and just see the maximum weight you can bear on your shoulders. The reason why I call it the atlas lift is because it is like Atlas; carrying the weight of the world on his shoulders.
Or a squat hold.
The reason why this is such an interesting and innovative concept is that in order to unrack the weight, you still need to push up with your legs. Thus, it is a formidable leg and thigh workout. And by just holding the weight on your shoulders, it will build up your whole body strength. For example, after doing my epic seven plate plus Atlas hold/squat hold, I felt it in my wrists, my shoulders, my traps, my back, my spine, my hips, my thighs, even my feet.