Hi!
I have the Forerunner 235 and have a question about the heart rate zones.
I wonderded how it sets up the zones and found the following on Internet:
While many people might think that having a heart rate monitor on their wrist means accuracy is a given, a lot of the data here is assumed from details you put in at the start. Max HR is calculated by using 220 - age, and your zones estimated from there, for example.
Garmin does have the power to adjust these on real-world data. However, you'll find that running with a chest strap will improve on this data-set. So even if you train with the optical (which is pretty accurate at medium intensity), it's worth hooking up a chest strap for the odd high-intensity session.
I use this Garmin watch for indoor cycling. In above article they say that heart rate zones adjust and improve while running.
Do these zones also change and improve while I'm doing indoor cycling? Then there is fewer data available (no speed, pace and stuff).