Hi everyone- My husband is 50 years old. He run/bike 3-4 times a week. He's in pretty good shape running half and full marathon once a year for the past 5 years. His heart rate gets as high as 184, avg of 159 and his effort level is a 7/10. He said he's not out of breath, not dizzy or feeling uncomfortable.. He was a little concern and actually saw his internal medicine doctor and brought this to her attention. She told him that if he's not having any symptom, that a high heart rate may be his norm. They did an EKG and everything was normal. I'm just curious what everyone think of this. Should I be concerned?