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russell_314

macrumors G3
Original poster
Feb 10, 2019
8,254
13,426
USA
I'm having a problem with my 40 mm AW S4 not tracking my exercise. Both the AW and iPhone are updated.

Just today it shows exercise 11/30 min although I did a 39 minute walk. I was wearing the watch and it even shows the workout.

I have a feeling that I'm going to have to reset the watch. What data will I lose if I do this?
 

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It won’t register as exercise if you don’t walk quick enough...could that be it?
If I walk any faster it would be running. It would make no sense to list walking as one of the choices and not count it as exercise LOL
 
If I walk any faster it would be running. It would make no sense to list walking as one of the choices and not count it as exercise LOL
Go to Walk details and see your heart rate info. If heart rate is not elevated enough it won’t register.
 
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When mine do this and I start the workout manually the heart rate is just dashes.

---BPM

I usually have to start the heart reate app, let it take a reading, and then go back to workout. If I do the heart rate before exercise, it seems to fix workout detection. Not sure why the sensor is going to 'sleep' when it's technically supposed to do one automatically every 10 minutes (which is the actual time it takes for an auto workout to detect)

Another issue that can cause it is you might be like me and have a normally high resting rate. I'm always at 90-110 BPM resting and have been since I was 15. So if you exercise and it doesn't go much higher than that then no workout detection or inconsistent detection.

Try also going to your iPhone and somewhere in the watch app is a link "Reset fitness calibration data". That forces the watch to relearn your walking speed, resting/exercise heart rate and so on.
 
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