I got my Forerunner 945 yesterday. Today I went for a 25 mile bike. Bike computer, map my ride, and Garmin all had similar distance ridden and time. All have my weight accurately (159lbs). Bike computer says I burned 1300 calories, map my ride says 1280, Garmin says 780. It was an 85 minute ride and my heart rate was in zones 3 and 4 for the majority of the time. I understadnt aht the garmin is the only one that takes heart rate into consideration, but I can't believe that I'm burning only 66% of what the other two devices estimate. My average heart rate was 127, resting is 57, if that helps. Does this seem like a problem with the Garmin?