The Index of Corporal Mass (I.M.C or B.M.I. ) he is one of the most trustworthy and simple methods to know if its weight is the suitable one. It is considered that light overweights (over an index 25) are not especially dangerous for their health, although is recommendable to always stay below the mentioned index. Obesity is considered when the obtained index is over the 30, which corresponds with a real danger for its health. It introduces his weight in kilos and their stature in meters, P. ex.: if it measures 173 cm of stature, 1,73 write (it can also make it in pounds and inches).