My wakeup heart rate was down to 55 this morning. It has been 61-62 during the past week, so the drop to 55 is significant. Wakeup heart rate is a guage on how hard your body is working while you sleep. A lower wakeup heart rate means your body is not working as hard while you sleep due to your body being in better condition.
Another good sign is that some slight swelling in my ankles has gone down.