Attach ankle straps to a cable machine and secure them around your ankles. Stand or position yourself facing the machine with your legs extended and core engaged. Bend your knees to curl your heels toward your glutes against the cable resistance, squeezing the hamstrings at the top. Slowly extend your legs back to the starting position while maintaining control and constant tension throughout the movement.
Log your inverse leg curl on pull up cable machine sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.