So I just got a forerunner 55 and I wanted to know if my calories look accurate. My watch showed that I burned about 600 calories from 12 am to 6 am while I was sleeping. I am on the heavy side weighing 240 lbs at 5 ft 10 in. Does this number seem accurate? I just want to make sure it looks right because I really want to keep track of the calories I burn.