Just the standard Step 1 review book if it fits with your curriculum.
I'm big believer in hitting the core reading for the big subjects, such as Constanzo for physio. The standard FA book isn't that great of a review for first year if you're just taking basic science classes separate. Knowing the FA section for cardio physio, for example, would result in like a 30% on your in class exams. I think review time would better be spent with BRS or HY books that go further in depth than FA but drastically less than a full volume book.