I'm a Brooklyn triathlete with 100+ races, a full Ironman, and a pandemic ultra I organized myself because everything got cancelled. I've learned that too much too fast means physical therapy. I got tired of managing training on spreadsheets. So I built something better.
You tell planblx your race, your race date, and how many hours you can realistically train. From there, it structures your season into phases. Base builds your aerobic foundation. Build adds race-specific intensity. Taper sharpens it and brings you to the start line feeling good rather than wrecked.
The structure follows training principles developed by researchers and coaches including Joe Friel, Stephen Seiler, Matt Dixon, Dan Plews, Alan Couzens, and Jack Daniels. These are the people serious age-groupers actually read. Their frameworks are what the plan is built on. Volume and intensity are balanced so you're actually getting fitter, not just tired.
Tell the coach what's going on in plain English. Work trip Thursday. Knee is acting up. Want to swap the long run to Sunday. It figures out what you mean, finds the safest adjustment, and shows you the updated week before anything moves. Nothing changes without your sign-off. You can also drag and drop sessions directly on the calendar. The coach and the calendar work together. Use whichever feels right.
For self-coached athletes, mostly yes. planblx builds your plan, adapts it week to week, and responds to what's actually happening in your life. What it can't do is watch you run and tell you your form is off, or talk you through a rough patch at mile 18. For that, a human coach is still better. For everything else, this is it.