Heart Rate
Why does the heart rate Heath not show on walk or run workout but it’s shows graph on all of the others workouts?
Apple Watch Series 1, watchOS 6
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Best reply
Chances are that your watch is not tight enough.
As per Apple
You may want to tighten your Apple Watch band for workouts, then loosen it when you’re done. In addition, the sensors will work only if you wear your Apple Watch on the top of your wrist.
I either push my watch up 1/2 to 3/4" inch on my arm so it is tighter while working out or I move the strap tighter by 1 hole.