Wlll Fenix 7 auto update Lactate Threshold with only bike with HR strap and power data?

cwoodffr said:

The basic question is, does auto update work with this config, and does it take over from manual if you toggle to auto update?

If you enter a manual value, the watch doesn't care. If you leave the auto-detection on, it will detect a new value if appropriate, whether the previous was manually entered or automatcially detected.

cwoodffr said:

Please don't suggest running test, as I don't run EVER.

Threshold for running is giving another FTP value from running power. Nothing to do with biking FTP.

You should try the built-in FTP test to make sure your set up is working for FTP detection. This will also give you a more accurate FTP estimate because the test is carefully calibrated as a ramp.

thanks for info.  First part is pretty much what I thought.  I manage and input my ftp manually as I use Trainerroad AI ftp as the master for that.  Separating FTP out, I am really just wanting to know what Garmin thinks my Lactate threshold value is.  So, will it update based on rides with HR strap and power meter?  If so, is it something that takes a number of rides to detect?  I frequently will see max hr update pop ups, in past when I had ftp detection enabled I would see those too.  Have never seen a Lactate pop up.

cwoodffr said:

So, will it update based on rides with HR strap and power meter? 

Correct. Needless to say, the ride/intervals need to be hard enough so that the watch sees your HR goes hard enough/long enough.

For example, a 30mn maximal steady power interval could trigger a new FTP value. Also, 6x-10x short maximal steady power in the anaerobic space (30s to 90s) could trigger a new FTP reading. Note though that in my experience the auto-detection during high intensity interval tend to give me a *lower* FTP value.

In the end, the detection is an estimate. All in all, you need to feel confident you could sustain your FTP for a long time (40mn to 60mn) and that would be a maximal-cannot-go-any-farther effort.

To be clear, not asking about FTP.....I enter that manually as detected by other analytics software I find better than Garmin's.  I let Garmin detect and manage Max HR and resting HR.  I am waiting to see it detect LTHR.....which I want detected.  Have never seen it pop up with an offer of a value.  My rides are very strenuous....usually off the charts for anaerobic effort.  Also mix in long zone 2's and stuff in between.  I changed the LTHR to auto detect about 5 rides ago.

Ah OK, yes I misread your previous posts. You were clearly asking for HR data.

You don't get LTHR values from cycling tests or auto-detection, just FTP.

To get LTHR, you have to use the running activity.

support.garmin.com/.../

With an Edge device though, you get both the LTHR and the FTP. 

This support link says same thing for edge and watches wrt auto detect. That's why it's confusing. 

Etupes25 said:

With an Edge device though, you get both the LTHR and the FTP. 

Yes, and GCM still confuses it after so many years. Garmin quite patheticly thought that if they were  renaming “Lactate threshold” to “Running Lactate Threshold” it would solve this confusion. Nope.

Eg. today my Edge 530 detected both a new FTP and a new cycling LTHR (154 bpm). GCM put it into “Running Lactate Threshold” next to running LT power and LT pace replacing my former running LTHR of 167 bpm. As it has been the case for more than 5 years,  maybe already 10 years, just for a long time w/o running LT power, because the latter was added  later.

It is why also running LTHR chart has jumping up and down, and not because I can increase or decrease my LTHR by 10 bpm or so.

I wish mine would change. Hundreds of high effort and intensity activities in this span of time

How close do you think that is to your max? Doesn't look like it's been detecting a threshold at all, after they released the software version that made it auto.

Edit... I notice this is an old thread, re cycling vs running etc, and I assume you have still not taken up running!