It's rare that a pre-med can do clinical research if that is what you're referring to by "medical research".
I'm sure you will have no problems doing psychology research as a concentration during your glide year but I would definitely look to trying to get some constructive results out of it such as abstracts, presentations, publication (stretch I know in one year but who knows) or at least a letter from your PI or lab supervisor.
It'll also probably show that you are more "well rounded" as well as a conversational topic during a potential interview.