This leg extension includes a stepless seat-depth adjustment and thigh adjustment so the rotation axis can be positioned perfectly. The starting position is adjustable in 10° increments, and the equipment meets MDD requirements. It includes protective paneling and has options like a SmartPanel display and lumbar support cushion. Other options are a range-of-motion limiter that is adjustable and 4 x 1.0 kg additional weights in fine gradations.