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All replies
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Helpful answers
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Aug 26, 2015 12:21 AM in response to mar0364by Jonathan UK,★HelpfulYou do not need to redo the initial calibration.
Whenever you walk or run outside using the Workout app (not the Activity app) with both your watch and your iPhone, it will continue to calibrate the accelerometer and get more accurate over time. You need to start and end a workout each time in the Workout app.
If you often walk or run at different speeds, it is best to accumulate 20 minutes of outdoor walking or running using the Workout app with your iPhone at each of those speeds. Each of those 20 minute calibrations can be accumulated over multiple sessions.
Ensure that you have configured your iPhone as directed by Apple:
- Settings > Privacy > Location Services - on
- Settings > Privacy > Location Services > System Services > Motion Calibration & Distance - on
More info:
Calibrating your Apple Watch for improved Workout and Activity accuracy - Apple Support
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Aug 26, 2015 2:17 AM in response to mar0364by nick101,★HelpfulIt's worth remembering that, when you walk/run *without* the phone, the watch only has your number of steps and average stride length to work with. It's smart enough to know the difference in stride between running and walking, but if your stride length changes significantly, the watch will struggle to maintain accuracy. Reasons your stride length might vary include: speed (faster commonly means longer strides); tiredness/unwellness (is that a word?) commonly mean shorter; terrain - shorter strides uphill, longer downhill, varying stride on rough terrain.
The more you walk/run with the phone, the better the watch will get at estimating, so take the phone with you from time to time. If the results you get without the phone are very poor indeed, you can start calibration from scrathc by unpairing/re-pairing but, as already posted, that shouldn't be necessary
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Aug 26, 2015 5:22 AM in response to mar0364by mar0364,Thanks!
I'll just keep on doing what I'm doing and the calibration will sort it self out.
Regards!
Rich
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Sep 6, 2015 7:45 AM in response to Jonathan UKby football96,Hello,
I've done walking and running calibration and keep the setting for GPS and "Motion calibration and distance " always on, when I use the workout app, but it seems to be not successful.
During a running distance of 12km, the measured distance differs from the real distance by more than 500m to 1000m.
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Sep 6, 2015 10:22 AM in response to football96by nick101,Is this happening when you run without the phone? Or with the phone?
Without the phone, the Watch has only the number of steps you take, and a stride length estimated from your calibration runs. If, for any reason, your stride length varies (injury, tiredness, different terrain), it will affect the Watch's calculations of distance and pace.
If you're running the same terrain as your calibration run, and similar pace, and you still get these odd results, try doing some more calibration.
Having said all that, there do seem to be some issues with the way the Watch deals with this stuff - hopefully, future software updates will improve things.
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Sep 6, 2015 10:52 AM in response to nick101by football96,Currently, I'm running always with the phone, active GPS and active "Motion calibration and distance". The running terrain is flat, sometimes trees along the route. Is a sometimes bad GPS reception (which I can't check during my run) the reason for wrong distance measurement?
How does the workout app measure the distance, if GPS is permanent available, based on GPS or sensor information? 500 - 1000m difference shouldn't be a GPS issue.
Due to the Apple description, the sensor calibrations should improve over time and my assumption was, after 2 month and min twice per week usage, collected data of my movement should be more than enough.