So usually my calorie burn is right around 125-130 per mile with my 235, but every once in a while I’ll get something around 75-80 per mile. For example, I ran a 5k at about an 8:30 pace a few days ago and it said I burned 406, but my 5k this evening was 254. Is it a miscalculation or is there something I need to do health wise to keep my calorie burn up?