What should i do to increase my metabolism?

Exercise: At your age, the only legal and safe way to increase metabolism is to do cardio exercise like joggin, brisk walking or bicycling, it increases blood circulation, decrease heart rate, boosts metabolism.

Eat better: A lot of time are metabolism is low because we eat low-metabolic foods like processed sugar and simple starch. Our body does not need to use any energy to break down and digest these foods. But eating a diet high in lean protein and complex carbohydrates will increase your metabolism. Daily exercise in the form of cardio along with yoga and weights would also significantly increase metabolism.