Nyirkos Gyors Régészet fitbit heart rate fluctuates jogász maró regenerálás
Fitbit charts a wild heart and a calming mind
Is Fitbit's resting heart rate accurate? - Quora
Heart rate fluctuates wildly through day. Could heart rate sensor be malfunctioning? I stand at work all day (sometimes moving and sometimes stationary in place) and mid-day it will drop to like