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My S7 hardly ever shows my pulse rate while using the outdoor walk workout activity. Anyone else having this problem?
I have had this problem for a long time, through several watches and OSs. In my case it is very sensitive to where I place my watch on my wrist and how tight the band is.
 
For a consistent pulse rate I’ve had to shave the part of the top of my wrist where the watch sits and have the watch fairly tight. I’m a very hairy man and I sweat profusely. I’ve noticed if too much sweat gets under the watch, the heart rate won’t work so I have to take off the watch, wipe down the underside and then put the watch on fairly tightly.
 
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