Mine's 44 (and I'm 39). I'm the opposite of most in that my HR remains low, even during intense exercise. The highest I've ever seen was 174 and I was on the verge of passing out at the time. Normally for me, a tough long hill where I am breathing hard has me at about 168...which I know is low compared to most. I don't know if that's good or not, but I've always also had low BP and stellar cholesterol, so I think I'm doing OK.