ab builder curling your hips towards your chest on a GHD, with the pelvis
moving rather than the torso
your legs hang off the end of the pad, so your lower back starts in extension
and the abs work through more range than a floor reverse crunch allows
the abs shorten your spine from the bottom end, where the GHD crunch works
them from the top
Execution
Lie face-up along the pad with your head towards the foot pads, your hip crease
just past the pad's edge and your knees bent. Grip the foot pads or the frame
behind your head. Set it once and keep it. If you move the pad, pick Changed
technique or equipment in the exercise menu.
let your hips and legs hang until you feel the stretch across your abs
curl your hips up, bringing your knees towards your chest
let your lower back round as your pelvis tilts under
stop once your lower back has curled off the pad, before you roll onto your
upper back
lower under control back into the stretch
Slow the lowering down. Dropping the legs back is what turns this into a leg
swing.