Originally Posted by
vinnyvincent
I'd get it checked out, but I did have a stress test about 4 years ago which came out normal, plus I have no problem reaching an exercise pulse rate of 170+.
As you get fitter, you'll be able to do the same amount of work at a lower heart rate. Your heart is a muscle like any other, and as your fitness improves, it will be able to pump more blood per beat, so for the same output it will need fewer beats.