High Heart Rate while exercising

[Jennifer8431]

I am a 33 year old runner.  I have run several marathons and consider myself in decent shape.  When I run my heart rate after 3 miles goes to 180-185 and stays.  When I do speedwork and hills it goes to 195.  I have been through 4 heart rate monitors to assure the accuracy.  I also consulted with a cardiologist and she said it was nothing to worry about.  Does this happen to anyone else.  My resting heart rate is 50.

[jim62]

If I was to run 3 miles, I figure my heart rate would likely be up in the 500 - 750 range.

Don't worry about it.

[Lisa2010]

I am not a great runner, but I run enough because I have to pass my physical tests for the army, so i'm in pretty decent shape...and even when i run just one mile my heart rate gets to 250. i'm seeing a cardiologist about it but as of yet there is nothing wrong and it has never really hurt me other than being painful sometimes...If it stays under 220 I wouldn't worry about it all, that was the number that my cardiologist gave me as been the line between normal and worrisome.