VO2max and performance acting strangely

I just did my first ever recovery run. In fact it was the first run I've done where I targeted low aerobic activity, I've owned a Garmin for 4 months.

Here's the weird thing, while doing my recovery run (which might still have been a little fast as Fenix 6 tells me I targeted base not recovery) my performance came up as -5 fair. That's the lowest I've ever seen it, it's nearly always positive. Then my VO2max dropped when I finished and my status changed from "Productive" to "Overreaching". It's nearly always been "Productive" and has never been "Overreaching" before.

Why did this slow run have this effect? I know it's a bit precious but I'd almost made the superior VO2max bracket and one slow run brought it down.

What gives?

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  • I see the same (though with F5+, not F6), and I've seen others saying the same; You don't get much "credit" from slow runs.

    Main input for VO2max calculation is HR vs. pace, and for slow runs the watch seems to think that given your current VO2max, the HR should have dropped more based on the drop in pace. This gives negative perfomance condition, which in turn gives a reduction in VO2max.

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  • I see the same (though with F5+, not F6), and I've seen others saying the same; You don't get much "credit" from slow runs.

    Main input for VO2max calculation is HR vs. pace, and for slow runs the watch seems to think that given your current VO2max, the HR should have dropped more based on the drop in pace. This gives negative perfomance condition, which in turn gives a reduction in VO2max.

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