Torch Fat and Build Muscle With the Tabata Workout — It's Only 20 Minutes

Reps: 12

Begin on your back with your legs straight and arms reaching overhead.
• Lift your head and arms off the floor and begin to roll up to sitting, focusing on the abs rounding the back and keeping the motion smooth.
• Roll back down to the mat slowly, one vertebra at a time, ending by reaching your arms overhead to complete one rep.