Refresh VMA value

Post a screenshot of which page you are looking at.

EDIT: Now I see that max aerobic speed and lactate threshold are not the same thing, Nonethless, Garmin only supports lactate threshold, and not max aerobic speed, as trux pointed out

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I think you mean lactate threshold speed (and heart rate) which are detected by the watch.

In the past, you had to do a guided lactate threshold test which required a chest strap.

Newer watches just auto-detect lactate threshold without a special test or chest strap, but the downside is you can't choose when it happens, and some people don't like the results.

Basically you just have to run hard enough for long enough and hope that your watch decides to detect a new threshold.

Here's the article on the newer auto-detection feature:

https://support.garmin.com/en-CA/?faq=bslU8erVhw62Xil6ptnEE6

And an article which talks about the old guided test:

https://support.garmin.com/en-CA/?faq=8buMedvX4x6ML5yb9rL5bA

And a background article from Garmin on the "science" of lactate threshold.

https://www.garmin.com/en-CA/garmin-technology/running-science/physiological-measurements/lactate-threshold/ 

The French term VMA stands for "Vitesse Maximale Aérobie", or Maximum Aerobic Speed (MAS) in English. It represents the maximum speed (pace) at which your body can consume the maximum amount of oxygen (VO₂max). It’s a key metric in endurance sports, especially in France and French-speaking countries. Unfortunately, Garmin does not use VMA. They use the LTHR Pace instead.

Key differences between VMA and LTHR pace (or speed):

VMA Speed at VO₂max (aerobic max) ~100% VO₂max Fast ~4–7 minutes
LTHR Pace Pace at lactate threshold (just below anaerobic) ~85–90% VO₂max Slower than VMA ~40–60 minutes (race pace for 10K–15K for many runners)

VMA pace should be faster than your LTHR pace. Here's a rule of thumb:

LTHR pace ≈ 85% to 90% of VMA

Thank you for the clarification! And sorry for the dumb post

Interesting ! So I can't fix VMA value on Garmin Connect. I've dreamed because, I must have see this in the past

"and hope that your watch"...

I've run my test with chest to retrieve more accurate heartrate max. But, certainly, I've don't make sufficient effort to change LTHR value