It never happened before but today when the workout was uploaded to strava, the heart rate graph appeared intermittent or sinusoidal, the peaks are the actual hr recorded, oscillating between the value and 0
I’ve tried deleting the activity and uploading it again with suf app: same result
I’ve tried uploading the FIT file received via email at the end of the workout: same result
Finally I’ve tried uploading the TCX file received together the FIT file, and it’s now ok, perfect straight line correct HR average (with sawtooth graph it was halved)
I’ll let you know if it happens again with the next workout