When doing back squats I feel a little unstable coming up. The weight shifts from my heels to the side of my feet and I have to try very hard to concentrate the weight around mid foot, and not let it move forward.
I read in other posts what the weight should always be on the heels. But from reading the starting strength, they always describe the weight as being "over mid-foot". So should I feel all the pressure on my heels, all the time? Or over the mid foot?