well as of now, I'm trying to build mass, and strength...his arguments for the 2 days on, 1 day off, 1 day on...etc....split, was that it allows for more healing time, and thus increases your gains....?
Its worth atleast trying what the trainer suggested. You might find out that that kind of split works better for you. give it a try.....if it sucks then try another. Trial and error kind of thing.
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It had long since come to my attention that people of accomplishment rarely sat back and let things happen to them. They went out and happened to things.
-Leonardo da Vinci
Also bear in mind that you should never feel too locked into one scheme. I use a three-day split (the ol' reliable push/pull/legs breakdown) and only work out a muscle group when it feels ready (i.e., not sore at all). Sometimes, I'll have a helluva squat day and will be physically incapable of doing squats again for a week -- no big deal. Other times, I'll be rested in three days.
I am on a rotating 5 day split and I take a day off whenever my body feels like it needs it. I am a firm believer in giving each major bodypart their own day.