A 9-Minute Workout for a Flat Belly and Smaller Waist

4. Plank

Start by supporting your body with your elbows (or hands) and toes.An important reminder: avoid sagging or arching your back or legs.2-3 repetitions lasting 30 seconds each. It is advised to switch up your plank while practicing the workout. First set can be performed on hands, second set on elbows, and third set can be performed in a side plank.2 minutes or longer for the workout.If you recently had a cesarean section (up to 6 months ago) or another surgery, have tendon difficulties, internal organ inflammation, or have issues with your heart or blood vessels, you shouldn't undertake the workout.