1
Stand facing the cable machine with feet shoulder-width apart, knees slightly bent, and core engaged. Position yourself at an appropriate distance from the machine so the cable attachment is at arm's length when arms are fully extended.
2
Grasp the cable handle with both hands using an underhand (supinated) grip, keeping hands shoulder-width apart. Allow arms to hang fully extended at your sides with a slight bend in the elbows. Maintain an upright posture with shoulders back and chest up.
3
Slowly lower the handle by extending your elbows, allowing your arms to straighten while maintaining control of the cable tension. Keep elbows stationary and close to your torso throughout the movement. Lower until you reach full elbow extension or near-full extension, feeling the stretch in the biceps.
4
Powerfully curl the handle upward by flexing at the elbows, bringing your hands toward your shoulders. Keep elbows fixed in place and squeeze the biceps at the top of the movement. Return to the starting position in a controlled manner and repeat for the desired number of repetitions.