Originally Posted by
AndrewLewis
Hook grip also very slightly improves the mechanical starting position of the lift, because the bar sits slightly lower in your hand than with a non-hooked double overhand grip, but that's a very small effect. It might matter if you need to add 1lb to your deadlift for a world record, but otherwise it will not make a serious difference compared to other training variables.
Regarding the thumb pain, I have never found that the pain goes away. Rather, I think lifters conceptualize it differently. They start by recognizing it as pain, and then as they get used to it, they recognize it as discomfort. I don't even recognize it as discomfort anymore - it just feels like an intense pressure. Like when you unrack a heavy press. It doesn't hurt. It's just really fucking high pressure in your hands.