Teenagers have stomach fat as they eat more Junk Foods
Crunches will help you to easily burn stomach fat and if this exercise is coupled with a proper diet intake. Firstly lie flat on your back on a mat. Bend your knees with your feet touching the ground. Now place your hands just behind your head and take a deep breath and lift your upper body off the floor. You need to exhale when you are lifting your body.
When you bring your body back to its original position you need to inhale. Once you come up you need to exhale and do this for 10 times and then repeat for two or three more sets. Next exercise is reverse crunches and for it lie with your back on a mat. Raise your knees with the feet planted on the ground and keep both the hands on either side of your body.
Push your feet in such a way that your thighs are perpendicular to the ground and your feet are off the ground. Now lift your back such that your knees bend towards your chest. Inhale when you place your feet on the ground and exhale when you lift your back and move your knees towards the chest. Repeat this for 10 times and for two more sets.