How to body build?

Very carefully! Sorry, i couldn't resist. Body build (as in get more/bigger muscles) in similar fashion to losing fat/weight except in opposite fashion. 3, 500 kcals = 1 pound but this time, you need calories in to exceed calories out. More importantly, you need adequate protein. Depending upon who you ask, some might ingest at least 1g protein per pound body weight.But don't forget resistance exercise to stimulat.