The BUILT Strength Infinite Series Iso-Lateral Kneeling Leg Curl trains each hamstring independently — one leg curls while the other rests supported on a pivoting knee cradle, eliminating the bilateral compensation that standard lying leg curls allow to go unchecked. The kneeling position lengthens the hamstring from the hip, placing it under stretch before the curl even begins and increasing the range of effective tension through each rep.

Starting resistance of just 8 lb per arm makes the movement genuinely accessible for technique work and rehabilitation, while a 4 × 25 lb max capacity supports meaningful progressive loading for strength development. Four integrated weight horns keep plates on the machine and within reach — no hunting across the floor between sets. Heavy-duty construction in a compact 40" × 54" footprint makes this machine an efficient addition to any commercial or performance training floor.

Primary muscles targeted

Secondary muscles

Key features

Specifications