hi Jenn,
I agree with itdood. not that big of a deal. Mine goes to 50 at night, maybe in the 40's. It never gets ubove 60's, unless I am stressing, treadmill.
Try not to worry.
What's your age?
It's a not a big deal. Mine goes down to mid 40s, I'm 47 and do not exercise anymore though I appear to be in good shape, I don't think I am. I've had it be that low, when my son fell out of bed, and my feet didn't hit the floor as a I jumped up to make sure he was OK. Didn't miss a beat (pun intended).