04-13-2016 08:34
04-13-2016 08:34
04-14-2016 08:41
04-14-2016 08:41
Hey hey hey @Woolnuts welcome to the Fitbit Community! Please don't be concerned if occasionally during intense exercise your heart rate goes above your Fitbit-calculated max heart rate. Sometimes because of your wrist position while biking, your tracker can over estimate your heart rate. Please make sure to place your tracker as instructed during your exercise 😉
Hope this helps! Have a wonderful day 😉