Since our hands clasp the controllers that clamp the cables that carry the tension ... each pulley is doing the actual heavy lifting of simultaneously loosening and slackening the cable pair ...

Cables provide constant muscle tension throughout an exercise ... Instructions: Attach handles to the pulleys of a crossover cable machine on each side. Choose a weight that you can control ...

In the center is a tension bar with pulleys on both ends though which the wire feeds. This bar pivots at the center and takes up slack while its position is encoded by turning a pot via a 3D ...