My HRM gives the same exact value for long stretches, has some rapid changing, and holds a fixed number again for a while. This does not seem to correspond to hills, sprints, etc


eg todays 20 mile ride
https://www.strava.com/activities/688719978/analysis
and a 56 miles ride
https://www.strava.com/activities/686195896/analysis


Anyone else get HRM readings like that? I don't mean the actual numbers (I know I run fast), but the shape