I heard if i do one bodypart a day for about an hour a day, it's really good for muscle growth. Is this true? Like if i did chest on monday, back on tuesday, shoulders on wednesday, biceps and triceps on thursday, legs on friday, and abs and obliques on saturday, would that help me at all? It seems to me like it's too much work, doing an hour for all of those by themselves. But that's what my friend who used to be skinny and got buff told me to do.