My Charge HR consistently underestimates my running distance during exercise, so I ran on a treadmill and compared the distances recorded by the treadmill and the Charge HR to come up with my new running stride length (simple a/x = b/y relation) and entered it manually in the app settings. I ran the same treadmill and distance again today and the app is still saying I ran the same distance as yesterday! What's going on here?
