Supine Reverse Crunches
Lie on your back on a mat with your knees bent, feet flat on the floor and arms spread out to your sides with your palms facing down
Exhale, and slowly raise your hips off the mat, rolling your spine up as if trying to bring your knees towards your head. Avoid any change in the angle of your knees during the roll-up. Use your arms and hands to assist with maintaining your balance and continue to curl-up until your spine cannot roll any further. Hold this position briefly.