"...as the weight gets heavier, it becomes a larger percentage of the total mass of the lifter-barbell system. As it does, it becomes more critical for the weight to be over the mid-foot as closely as possible, because otherwise you will have to do one of two things: 1) you will have to counterbalance the weight by extending part of your body away from the mid-foot in the opposite direction, or 2) you will have to input a horizontal force on the bar to move the weight back to the balance point, which is hard to do well, and which we will discuss extensively..."

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