Im working out every other day and attempting to do cardio on the days im not lifting. being that im trying to gain some size i want to conserve all the calories i can by not burning them when i can avoid it. i feel if i do cardio im going to loose any size i do have. i know i'm wrong with this but i can use some input as to when is best for cardio. im doing a 5x5 chest/tri back/bi shoulders/legs split. i do this every other day and abs on non lift days. is their a more productive way to split, like lift for 2 days rest for 2 ect. any ideas about cardio and the weekly split would be great. also working on my diet and will be getting around 3500cals which will help with the size thing.

cardio on your days off, or even after your workout will not hurt your size. Just do some light jogging/cross training/biking for 30 mins 2-3 times a week. It will not effect your size - other than helping keep the fat off.