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Sit facing the couch with your knees bent, feet flat on the floor (you can also tuck your toes under the edge of the couch for help with this move), and place both hands behind your head.
Lie all the way back onto the floor, and then sit up as quickly as you can (you can reach your arms forward to help you sit up if needed).
Next, slowly lower yourself back to the floor, first placing your lower back on the ground (part 1), then your midback (part 2), and then finally let your upper back and head touch the ground (part 3). Sit up as quickly as you can and repeat up to 15 times in a row.
Do this total-body, fat-blasting circuit in your living room–no equipment required!
The Ultimate Home Workout