Lactate Threshold not updated

My Lactate Threshold used to be measured / calculated automatically. Now, it has not been done since June 12. Is this a bug, or am I missing a setting somewhere ?

According to:

https://www8.garmin.com/support/download_details.jsp?id=14317

firmware 7.60 was released on June 17.

0 Dr Phil over 5 years ago

Or perhaps not done anything to warrant an update?

0 CMA-CPH over 5 years ago in reply to Dr Phil

Hmm, I have been running 2-3 times a week - a parkrun as one of my runs as good as every week. If I remember correctly the parkrun almost always generated an update.

0 AllanOlesen67 over 5 years ago

I have recently had some runs, which I had expected to generate a new lactate threshold, but they didn't.

The Firstbeat LTHR algorithm uses a dive in HRV (heart rate variability) to detect LTHR.

When I looked at my HRV data after the "failed" runs, I did not have the usual dive in HRV around my usual LTHR. I wonder if the hot weather is messing with my HRV. It is surely messing with my HR.

0 CMA-CPH over 5 years ago in reply to AllanOlesen67

If the hot weather is causing the problem, I should have gotten an update on Juli 6. On that date I ran a 5k parkrun in 12 degrees Celsius and light rain.