Questions for everyone, i am looking to lose some excess weight, i don't run a heart monitor as i have large pecs and i can't get the strap to lay right to record anything. When i use my Garmin for a 1.5 hour workout, it shows something like 1400 calories burned. When i upload the same file from the garmin to strava, it will show like 700-800 calories. I am assuming the Strava reading is more accurate. Why the difference, which one is really more accurate.