Glute Ham Developer Sit-Up & Russian-Twist

Adjust the glute ham developer machine so your hips rest comfortably on the pad and your feet are securely locked behind the foot rollers.

Cross your arms over your chest or place your hands lightly behind your head.

Engage your core and lower your upper body backward in a controlled motion until your torso is parallel to the floor or slightly below.

Contract your abdominal muscles forcefully to lift your upper body back up to the starting upright position.

Pause briefly at the top while maintaining tension in your abs before beginning the next repetition.