Record heart rate for indoor workout - can't get it to work
I would like to use Strava to record my heart rate during indoor workouts (spinning and crossfit) using the iPhone app.
I would like would like to put the phone down in a corner of the gym or on my exercise bike and leave it alone during the work out. When I have tried this, the resulting workout show no recorded data and it tells me that the workout was 0m 0s in duration.
I've turned off auto-pause for both cycling and running. I'm not looking for the phone to record moving time or power data from the bike, etc. Just heart rate during the entire period from the time that I start the recording to the time that I stop it.
Is this not possible?