Plank is awesome exercise to strengthen your core and flatten the stomach. It is very simple to do and surprisingly effective.
- Get into a position shown on the image above.
- The pressure must be on your stomach.
- Stay like this for 30 sec.
- Then rest and repeat 3 to 5 times.
Just like any other exercise, plank must not be overused. Remember that flat stomach is a combination of healthy nutrition and exercise. This is just the second part. If you overdo it, there is a chance that you injure your abdominal muscles. Take it easy, do it in moderation and the result will be fast.