I've been a premium user on TrainingPeaks for a few years, watch my Dashboard like a hawk and have no idea what you're talking about. Your posted image is way too tiny to have any clue about what it's showing. If my CTL hits 70-80, that's it for me. If I try to hold it there, I overreach in a couple weeks. That's the "fitness" score. My TSB ("freshness") I keep in the +20 to -30 range, with as little time as possible near 0. ATL ("fatigue") is all over the place, 30 to 120 basically because I have a life outside of cycling and enjoy doing stuff that's really hard for me and then recovering. I'm 71. YMMV.
So yeah, I find the numbers extremely useful. If my TSB is +10 or better, I'm going to have a good event. If I try to hold my TSB at -20 for very long, I'm going to overcook it.
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