Spirit Dual Leg Extension/Leg Curl (CSD-LELC)

The CSD-LELC trains the quadriceps with leg extensions and the hamstrings with leg curls — two opposing muscle groups that are most effectively developed together. Users switch and adjust between exercises without leaving the seated position, eliminating transition time and keeping the training session focused and efficient.

The axis of rotation is precisely engineered to align with the natural knee joint mechanics for both extension and curl movements — ensuring that resistance is applied at the correct angle throughout the entire range of motion. The result is better muscle activation, reduced joint stress, and a more natural feel on every rep.

The easy-adjust seat back accommodates users of different leg lengths — positioning the knee correctly over the axis of rotation for both exercises. Yellow color indicators make the adjustment fast and visually clear, so every user can dial in their fit quickly without guesswork or manual consultation.

A 210 lb fully enclosed weight stack with 5 lb increments provides enough range to challenge users from rehabilitation-level loads to serious progressive overload. Premium LOOS USA cables deliver smooth, consistent resistance across both extension and curl movements — with separate pulley ratios calibrated for each exercise direction.

An integrated rep/time counter keeps users on track through every set, while start/finish workout diagrams ensure correct positioning for both exercises. A large storage tray on the top cap keeps personal items off the floor and within easy reach throughout the session.