Hi, I've had my vivoactive 3 for a long time now, last year and this year, I notice that whenever I go for bike rides, most of it shows as zone 5. Is this a fitness thing or a device issue?
I'm a 43 year old male, just under 14 stone, 6'3", my Average Resting Heart rate gets recorded at ~60bpm.
But when I go for a decent Bike Ride it's like this. This was a ride yesterday of 15 miles over an hour, no crazy climbing.
What I've never been able to work out is whether I am that unfit (it's possible) or whether it's a device/garmin thing.
Z5 > 161
Z4 = 143 - 160
The ride before was shorter, 9 miles, but similar effect.