ive been for a 50 min 8km run.. and vivoactive 4 says i burned 160 calories. ?! this seems far too low -my heartrate was fairly high and i was in zone 4-5 most of the time, so whats happening?
ive been for a 50 min 8km run.. and vivoactive 4 says i burned 160 calories. ?! this seems far too low -my heartrate was fairly high and i was in zone 4-5 most of the time, so whats happening?