The glute-ham-developer sit up is a more complex variation of the sit up that works the hamstrings and buttocks as well as the core.
How to perform a GHD Sit Up:
Sit on the bench and tuck your feet underneath the foot pads.
Clasp your hands behind your neck.
Lower your upper body backwards towards the floor until your hips are almost fully extended. Your butt should still be on the bench and your abdominals should be tight.
Raise your upper body up by contracting the abdominals and straightening your hips until you are back up in sitting position.
Questions
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