Amazfit Active Max is next to get lactate threshold metric
The Amazfit Active Max is now getting a useful running features, with firmware version 3.7.0.1 adding support for lactate threshold measurement in a 12.25MB update. This marks the latest step in Zepp Health’s wider rollout of the tool, which first debuted on the Active 3 Premium before making its way to the Balance 2 and T-Rex 3 Pro.
A useful upgrade for runners
This is a metric that goes beyond the usual pace, distance and heart rate stats. Lactate threshold helps identify the point during a run where your body starts building up lactate faster than it can clear it. In practical terms, that is the moment when effort shifts from sustainable to hard.
For runners, this matters because it allows the watch to set more personalised training zones. Instead of relying purely on age-based heart rate estimates, the zones can better reflect your actual fitness level. That makes interval sessions, tempo runs and threshold workouts more useful, especially if you are training with a specific goal in mind.
The feature first appeared on the Active 3 Premium and was one of the more interesting additions on that watch. Just yesterday it rolled out to the T-Rex 3 Pro, so seeing it now arrive on Active Max feels like Zepp Health is quickly standardising the feature across more of its lineup.
A good fit for the Active Max
What makes this update particularly interesting is that the Active Max already feels like a strong match for more serious runners. In my review, one of the things that stood out was how much watch you get for the price, from the large 1.5-inch AMOLED display to long battery life and a design that looks closer to a sports watch than a basic fitness tracker.
Adding lactate threshold gives it another layer of credibility as a training device. It helps move the watch further into territory that used to be reserved for pricier Garmin and Polar models. For anyone who bought the Active Max earlier this year, this is exactly the sort of post-launch support you want to see.
The update also includes improved sleep staging accuracy, along with the usual system optimisations and bug fixes, so there is a bit here for non-runners too.
Our take
This update makes a lot of sense. The Active Max already had the hardware and sports focus to support something like this, so it always felt more like a matter of when rather than if.
The feature is quickly spreading to the rest of the lineup. That suggests Zepp Health sees lactate threshold as a core training feature going forward, not something reserved for one or two headline models.
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