I have my V5 watch face set with the workout app as one of the apps on the face. This morning I woke up to find that somehow my exercise app had opened and I had been "exercising" for 58 minutes!! but I was asleep!! How could this have happened and has anyone else had the same thing. According to the watch I was standing for 3 hours ( at least 1 minute pre hour). I apparently took 888 steps too. I can't remember how many calories it said I burned. What could have cause this?