HRM question

I currently have a Polar FT7M and love it. However, I have recently started to track my recovery heart rate. My HRM does not calculate that for me. While it is easy enough to do, I am curious if there are any HRM out there that will determine this for you? What I currently do is to note my HR at the end of my exercise and then 1 minute later. As I said, that is easy enough to do in theory but I have to stop recording the session I just completed and then reset the HRM to show my HR in order to know what it is a minute later. It would be cool if the HRM would record that automatically. Does anyone know of an HRM that does this?