In most gyms you’ll see a medicine ball or dumbbell held between the feet for resistance during knee-ins, but since the weight is acting downward, this tends to over-activate the hip flexor muscles to keep the weight up off the ground. A much better option is to use horizontal loading using a cable, which provides resistance in the direction of the movement.

The video demonstrates three cable attachment options for low-pulley knee-ins. For more information, visit https://www.theelitetrainer.com/blog/low-pulley-knee-in/