Mine has been that low, but I have a little medicine to slow it down, and it took a LOT of exercise to get it down to the forties.
btw, thanks for stopping in on the Dose!
you're welcome :)
Mine is in the 64-66 range and has been since 2000 or so.
Before that, when I was still in high school and especially when I was in wrestling, I was down in the 50s....