STARTING POSITION:
In a hip flexor abdominal machine, place your forearms in the pads and grab the handles. You should hold your body only with your forearms while your back is resting on the pad. Contract your pelvic floor and core while keeping your chest up.
MOVEMENT:
Move your legs together towards the roof until your they are parallel to the floor while you exhale. Return to the starting position in a smooth movement while you inhale.
TIPS: Focus on slow and controlled movement. Do the exercise with your legs straight.