Lying
down with your knees bent and feet flat on the floor as close to your butt
as possible, grab your ankles and hold onto them while you rise your hips
up and arch your spine, lifting your abs towards the ceiling.
Lift your abs as high as possible. Go back down. If you can’t hold onto
your ankles, keep your arms to the side and use them to push yourself up.
Each repetition should last between 3-10 seconds. This stretch may be hard
to do at first, but be persistent even if you can’t do it completely
right at first.