- Starting position, laying on your back with ZejaX behind your head and arms extended.
- Do a reverse crunch bringing Zejax over your feet, and straighten your legs.
- Repeat the reverse crunch bringing Zejax over your feet and head again.
You can do it both very slowly and as quickly as you can and see how that feels. Both ways are good for different purposes as you can imagine.
This exercise and many variations are found on the programs: