Lactate Threshold - how to trigger?

I do see no pattern when this is triggered either.

Interestingly I got a Lactate Threshold detection on this morning's run, but what makes it interesting is that it was a Hill Repeat Vo2max workout.  I did repeated 3min hill climbs at high HR/effort.  Afterwards I was surprised to see a new Lactate Threshold HR and Pace shown during the activity save.  What's strange is that on none of the hill repeats did I come anywhere close to the LT pace it "detected" nor did I on any of the warmup or cooldown either.

So apparently it's doing some strange voodoo calculation based on my pace on the hill reps, even though they were much slower than the LT pace prescribed.

Do you get an update pretty regularly?  I have had the watch for more than a year and run often as my primary sport and have never gotten a threshold HR or pace detection.  It detects vo2max regularly and my maxHR and zones are all setup well.  Have ran the 'Threshold Test' a handful of times with everytime resulting in a 'No Threshold Detected' - have done plenty of hard workouts in regular outdoor run mode that should trigger it (2-4mi sustained hard threshold runs), progression runs from below to above threshold pace, long and short intervals...  always with the Garmin HR Strap HR-dual (have had two straps in this time) so HRV should be good.

Have a tech support ticket in and it sounded like it is a common known issue of some people not getting a result... Haven't ran since 7.2 firmware came out due to a shattered collarbone... but start running next week!  So hopeful maybe they fixed that issue.

Hi Nick - Yeah if you read the whole thread, I started it because I could never get it to detect and was trying to figure out the manual test for it, etc.  I could never get a detection either, HOWEVER I recently changed my max HR listed and I am now getting regular (once a month or so) LT detection triggers.  I think my max HR was listed as too high previously (it was an old max that I've reduced due to age and the new one seems more reasonable), so maybe that has been the difference.  No way to know for sure.

Well finally got out for a good strong run after coming back from injury... still nothing on the LT / Pace.  Didn't try the test yet, but todays was a strong 5km in the middle or run progressing from Tempo to vo2max effort almost... thought maybe it would trigger . ... nope.  

tried lowering max HR by a couple today, we'll see in the coming weeks.  thx!

I think mine has never triggered LT measurement. I tried to do a test but paused it when crossing roads, this stopped the test without me realising. I'd suggest chest HRM, auto-pause off, run the test on a long totally flat road or large diameter track without pausing. Prepare for pain! Wait for notification of test complete. I suspect once the test has been run successfully it will trigger updates on normal long tempo runs. 

I've had no success though and injury prevents me doing high intensity efforts. Auto FTP and VO2 max calcs work fine for me however. I really wanted to set a benchmark running lactate threshold so I could monitor it but I've given up now!!!

Well glad to see i am not the only one w/issues.  After a handful of super hard 'LT Tests'... "No Threshold Found..."  WTF!!! lol ...i've kind of given up on them. 

I think the key is to do them when really rested so that you have the energy to really let rip on the last couple steps of test when it is asking you to get HR up above LT HR.  

I know in the past roughly what my LTHR (~174) would be from a 10mi race that I paced and raced very well... took me 1:04hr ,  Which is what they usually say is your LT Pace '1hr race pace'.  Although it was a drizzly 38° day so likely suppressed HR a few beats or more.  When it asks me to push pace up to hit 180bpm or more and legs are already getting sluggish... makes it a hard test!!!  

This run last Sunday resulted in a new lactate threshold being generated. I suspect it was more the change in pace for the last three or four kms that made the difference. This was just a run and not doing the test.