My vivosport seems to show a realistic heart rate in its screen but when I sync data to the Garmin Connect app on my phone the heart rate timeline shows a steady rate of 126 bpm during the periods that I wore the vivosport.
(Note other data is from my Forerunner 935 and I do not wear both watches simultaneously.)
After I noticed this I have unpaired the vivosport from Garmin Connect and reconnected. However still showing 126 bpm.
Any advice?