- Nov 9, 2015
- Reaction score
I have a similar experience also. The optical sensor is actually pretty good for me compared to the chest strap, but I've heard it varies a ton based on your skin tone, wrist placement, etc.I actually have the Garmin chest HRM too and don't feel like it's too much different from my watch.
The Garmin app indicates my lactate threshold is 161 BPM at 7:55 min/mi.
Re LT: I don't allow Garmin to auto-calculate but when I did, it was off for me. How would you feel if you ran for 20 minutes at that HR?
I don't think HR is a completely useless metric. After all, it's literally a physiological measurement of how hard your heart is working. Sure there is going to be variance day-to-day due to external and internal factors, but it shouldn't be wildly inconsistent. +-3 to 5 bpm is the usual variability for someone who's been consistent for more than 8 weeks. Any more than that and it's likely an indication that something is off.