I really don't notice mine while riding either but I think mine displays 20 to 30 beats higher then actual HR. I had a fit bit hr that showed way less and also had an ekg and stress test. The fit bit was right on with the ekg. For the workout that I got on the treadmill the ekg only had me in the 160's where I know the garmin would have shown me in the 190's by how I felt.