Calorie count during Car/train rides way off?

Discussion in 'Apple Watch' started by chfilm, Sep 22, 2015.

  1. chfilm macrumors 65816

    chfilm

    Joined:
    Nov 15, 2012
    Location:
    Germany
    #1
    Hi,

    I recently did a couple of long car and train rides, about 6 hours each, and realized how my calorie count went slowly high and higher, throughout the ride.

    This also happened, after I reset the watch twice.

    Anybody else recognizing this behavior? In a car I could imagine that the amplified stress level on a highway could raise the heart rate to a point where the watch thinks I'm burning calories, but sitting on a train?
    Or is the accelerometer somehow being thrown off by the movement?
     
  2. Julien macrumors G3

    Julien

    Joined:
    Jun 30, 2007
    Location:
    Atlanta
    #2
    This
     
  3. friedmud macrumors 65816

    Joined:
    Jul 11, 2008
    #3
    The Watch has to infer what you're doing based on the sensors it has. If it thinks you're swinging your arm because you're bouncing around in a train... then it thinks you're walking.

    How much is "way off" though?

    I'll note that you definitely do burn some calories above your resting calorie burn when you are in a car or on a train. Your muscles are constantly working to counteract all of the forces and keep your body upright and your head level.
     
  4. chfilm thread starter macrumors 65816

    chfilm

    Joined:
    Nov 15, 2012
    Location:
    Germany
    #4
    Well, I can't tel you hoe OFF it is, but it definitely feels weird that if I Jahr sit in a train for 6 hours, I'm supposed to have burned 500 calories, while during the same time on front of the computer I just burn maybe 80 or so..
     
  5. friedmud macrumors 65816

    Joined:
    Jul 11, 2008
    #5
    500 is quite a bit - that's a bummer. I haven't used it on a long train ride like that yet. I would consider 500 to be pretty far off ;-)
     
  6. chfilm thread starter macrumors 65816

    chfilm

    Joined:
    Nov 15, 2012
    Location:
    Germany
    #6
    If it's the sensors being thrown off by the movement, I'd suggest, that apple combines the arm movements with the gps of the iPhone, to see that I'm in a vehicle.
     
  7. chfilm thread starter macrumors 65816

    chfilm

    Joined:
    Nov 15, 2012
    Location:
    Germany
    #7
    Exactly. Maybe it's 300 or 400, but it is a lot
     

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