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Left/right wrist

Former Member
Former Member over 5 years ago

I understand that the FR945 wants to know which wrist he is on because of gesture.

Is it just that or also because of something more serious like OHR (I man, I dont know... after all the human body is not symmetric)?

I am asking this because I sometimes switch wrist. If it s just because of gesture, I cant be bothered in telling him each time that i switched. If this has an impact on accuracy of HR monitoring or something else, then i ll definitely bother.

  • 0 over 5 years ago

    IIt's preferred to wear the watch on your non dominate wrist.  You'll naturally have more movement with your dominate wrist, so wearing it on your non dominate wrist and selecting that side will assist in false steps readings and false triggers of the move alerts and move IQ feature. 

  • Former Member
    0 Former Member over 5 years ago in reply to tess

    Thanks tess. But apart from steps, stairs, light activation.. Does the OHRM need to know which wrist it s on?

  • 0 over 5 years ago in reply to Former Member

    The OHRM doesn't need to know in which wrist it is on, but keep in mind that results can differ from left to right wrist. I tried both wrists and in my experience my right wrist gives me more accurate results than the left wrist, I don't know why, maybe the position of veins differ between right and left arm. By the way, I'm right handed. I asked in another thread why the watch wants to know on which wrist it is on. I tried "wrist gesture" on both arms and it functions always, so I'm not sure that the watch asks this for gesture. In the other thread I asked if it was for the calculation of the accelerometer inside the watch to calculate the position with the gps, but other users said me that this was not the case. So really I'm not sure why the watch asks in witch wrist it is on.

  • 0 over 5 years ago

    I think the left vs right wrist variable plays a role in the algorithm for determining the left leg vs right leg foot strike times in the Ground Contact Balance calculation. I don't know how else they could determine which leg is striking the ground. The ground contact time is measured by an accelerometer in the HRM4 heart strap.