The cable chop sounds great on paper, but when it comes to the execution it's less of a core exercise and more of an arm blaster. Also, the resistance changes drastically from beginning to end.
With this method, the Swiss ball acts as a cam similar to what you'd find on a machine, giving you the feel of constant, equal tension throughout the ROM and putting that tension right where you need it.
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Increase starting strength with this lift. Bring the bar down controlled and rest it for a half-second without letting the bar sink. Accelerate with as much force and speed as possible.
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These unilateral exercises are so tough that’ll wish you could use both legs. (But you can’t.)