Adjust padded supports and kneel upright in apparatus. Position knees on near-upper side of padded hump, ankles between padded supports, and feet on platform. Place arms behind back, across chest, or bent beside head depending on desired intensity.
Lower body until horizontal by straightening knees. Raise body by flexing knees only allowing hips to bend slightly. Repeat.
This is an advanced exercise performed on Glute Ham Raise Apparatus. This movement is also known as Hamstring Raise. Dorsal flexion of ankle reduces active insufficiency of Gastrocnemius allowing it to assist in knee flexion. Also see Inverse Leg Curl comments.
Movement is easiest with hands behind hips as shown and when knees are positioned slightly further down on hump. Also consider the Glute-Ham Raise or performing self-assisted version.
Exercise can be made more challenging by placing arms across chest or even harder by placing hands on head or beyond head. See Arm Position During Waist Exercises. Movement is also harder with knees positioned slightly higher on hump. Exercise can also be performed with additional weight.