I used to train over 4 days but recently changed my workout so can do it in 3 and then if I get in on a 4th day one workout gets done twice. DAY 1 chest/legs DAY 2 arms DAY 3 shoulders/back. I was just getting used to it when someone suggested I shouldn't be training chest and legs on the same day and now am getting stressed trying to re schedule it. Your opinions much appreciated