When I say slow, I really do mean slow. An average resting heart rate is 70-100 beats per minute. Mine is in the forties - the slowest I've ever seen it was 43bpm, but it's usually around 48.
What I want to know, though, is what my maximum safe heart rate should be. It's generally calculated as something like 220 minus your age. But for an average 35 year old that's somewhere around 2.5 times their resting heart rate. For me that's more like four times my resting rate - so is that still a suitable figure to use if doing something intensive like running?