Calories burned discrepency

I get almost all my exercise through running. Problem is when I log it on MFP it gives me substantically less calories burned than my treadmill or my garmin says. For example, if I run 3 miles on the treadmill it says 470 calories burned (my garmin will say a similar number if I run 3 outside). When I log it in to MFP it will give my about 380 calories burned. Does this happen to anyone else? Which do you believe???

Replies

  • Are any of those from a HRM? I have noticed machines tend to run really high, after having tested it against a reading from a HRM.
  • I go by my Garmin (I use it with the HRM) and enter my cardio manually.