Lie on a glut-ham machine face down, with your ankles between pads. Lower your torso by bending your hips. Place the barbell on your shoulders behind your neck. Grip the bar with your hands slightly wider than your shoulders.
Slowly raise your torso until it is parallel to the floor. Continue to raise your body by bending your knees, keeping your hips straight.
Hold this position for a moment and slowly return to the starting position.