How do I update the data that governs my suggested workouts

I'm a 72 yr male that keeps getting suggested running workouts
that are way far the mark. And my race predictions are way off,
no way am I running a 1:30 half marathon 

So my data needs to be adjusted to reflect reality.

  • Wear the watch 24/7, make sure the heart rate zones, maxHR, lactate threshold are set correctly.

    But realistically, there are 2 types of users: those that have close race predictions, and those that are way off (for me it's always too optimistic, though probably off only by a few minutes)

  • Have you tried selecting one of the suggested workouts and then doing what would be a reasonable pace and distance for you, so it "sees" what is appropriate for you? No idea if it will work. I find my suggested workouts progress or regress depending on what I've been up to, but they weren't too far off to begin with.