Yes, I haven’t particularly tried to track the rate of decay but just took a look. So my current VO2 Max is now down to 1.7. Which is because I haven’t done a VO2 Max TR workout since early August at which point I was at 4.2. I imagine the rate of decay will be similar or the same across all workout types.
Makes sense in terms of the data TR has. As TR can’t put levels on non-TR rides yet, it thinks I’ve only been doing SS and below for the last 2 months, if that was actually the case then I’d almost certainly fail a level 4+ VO2 workout right now. In reality I know that I’ve been getting plenty of VO2 time through races and somewhat structured non-TR outdoor rides (e.g. group rides with a bunch of 3-6 minute climbs done basically flat out, and steady aerobic riding in between). So as and when I start doing VO2 workouts on TR again (probably pretty soon the way the weather is going!) I’ll likely just replace the first scheduled/recommended workout with something around level 4 which will bump TR up to a more realistic starting point for me.