are u rich?
if yes,
go to the kind of shop which sell muscle building type of
things
dont just buy whey protein to train muscle, also u must buy
supplementary,
supplementary gives u the power to train and when u grow muscle the
muscle will grow more effectively, thus it has the ability to make
a thin ass to a muscular ass.
if no,
gain fats using mac, kfc and etc.
then go gym train,
the speed when u have fats to train is faster then just training it
without fats....
so good luck.....
and and, to prove my method, i was a 47kg 160 cm guy,
now : 98 kg 174 guy....
and
haha
Cheers
IA