Burn Fat!

Starting go to aerobic class recently..(coz juz found dat my body full of oil fat =..=)
i know these coz got health test from HERBALIFE.
My result like this:
WEIGHT :55.5KG

BODY FAT:31.3%

WATER:50.3%

MUSCLE MASS:35.9KG

PHYSIQUE RATING:5 <------------- only this relly gud==(mean my muscle big enuf)

METABOLIC RATE:1198 (actually need 1332)

METABOLIC AGE:27TH <-----------WHATTTTTTTTT!!!!!!!!!!!!!!!!!Im juz 21th!

BONE MASS :2.2KG

VISCERAL FAT RATING:4


And the HERBALIFE profession said tat i muz loss at least 4 kg according to my height juz 158cm(But actualy i dun know my height got increase or not coz 158cm is my height when im 17th.

Well,its time to making myself healthy now .But if juz use mouth say only tis plan muz b what?sure FAILED.