TrainingPeaks tracks everything that builds fitness, but nothing that breaks it. I'd like to see injury tracking added as a first-class data type, not a metric comment buried in the calendar.

Four parts:

1. A dedicated injury entry type. Log an injury via a visual body map plus a structured body-part list (so it's selectable data, not free text). Each entry holds detailed descriptors, rehab methods, and attachments from a physio or medical professional, all in one place on the calendar.

2. A daily pain score out of 10. The entry repeats daily, so the athlete logs where the injury is at each morning. Over days and weeks this shows duration and whether pain is trending up or down, and whether the current load is helping or hurting.

3. A PMC overlay. Plot injury onset and pain scores against the Performance Management Chart: CTL, ATL, TSB, and intensity factor. Most overuse injuries trace back to spikes in volume or intensity. With injuries on the same chart as load, the pattern becomes visible.

4. The payoff: a personal injury danger zone. Over time the overlay tells each athlete the story of their own breakpoints, the fatigue and ramp-rate conditions where injuries historically appear. That's an early-warning signal: see it coming before it becomes a training-block interruption.

Consistency is the single biggest driver of endurance performance, and injury is the single biggest threat to it. This closes the loop between the load data TP already has and the health outcomes athletes care about most.