vicki_tigger (Jogger) and others: Thank you for the confirmation that it is not just me or my Blaze. I, too, wanted to monitor my heart rate during the day and night. I have other problems with my Fitbit [at least the Blaze] and that is if I wear it too long my wrist skin starts to get irritated, just under the watch, not the band. In fact, on the Blaze the pulse sensor is a hump and a blister formed! Now, I can’t wear it at nights and for several days I have to leave it off to let my wrist heal. Good grief. This has not worked out at all as I had anticipated . . . that is, keeping it on 24 hours.