Originally Posted by jrennie
When I first started to get in shape my resting heart rate was around 70, about 8 months ago it was around 60 and now i'm down to a resting rate of 37-39. Should I be concerned with this drop(I do cardio based workouts(cycling or running) daily and hit the gym 4-5 days a week)or is it to be expected?
I have a similar resting heartrate (around 40) but it's always been that way when I'm in shape. A year ago when I started riding I was in the low 60s and I was reasonably fit. When I'm out of shape I'm in the low 70s so my heartrate has changed in about the same time range as you. My doctor girlfriend doesn't see any problems with my low heartrate considering all the riding I've been doing.
Still, since you seem a bit concerned you can check it out with your doctor. When I've done that before, they look at me, ask how active I am then just say that it's normal.