Attach an ankle strap to a low cable on a pull‑up cable machine and lie face‑down on a bench or mat with the strap secured to your ankle. Keep your hips down and core stable while bending your knee to curl your heel toward your glutes against the cable resistance. Slowly lower your leg back to the starting position with control, maintaining constant tension on the hamstrings 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.