1
Stand facing the cable machine with feet shoulder-width apart, knees slightly bent, and core engaged. Position yourself at a distance where the cable has tension at arm's length.
2
Grasp the cable handle with both hands using an underhand (supinated) grip at approximately hip height. Keep shoulders relaxed and elbows close to the torso throughout the movement.
3
Slowly lower the handle by extending the elbows and allowing the forearms to straighten. Control the descent and maintain tension on the biceps, resisting the cable's pull back to the starting position over 2-3 seconds.
4
Flex the elbows and curl the handle upward by contracting the biceps, bringing the hands toward the shoulders. Squeeze the biceps at the top of the movement for 1 second, then repeat by lowering with control.