run-race-predictor

Predict marathon times from recent Strava runs by analyzing your best efforts using Riegel and VDOT methods. The predictor anchors your fastest recent run and calculates estimated finish times for 5k, 10k, half marathon, and marathon distances.

To estimate race finish times, you need stored best efforts from recent runs. If missing data is detected, the predictor backfills your best efforts from stored Strava activities to ensure accurate VDOT and Riegel calculations.

Yes, you can use VDOT and Riegel formulas to check if you are ready for a sub-X race. The predictor evaluates your recent best efforts to calculate achievable finish times across 5k, 10k, half marathon, and marathon distances.

The race predictor works without complete Strava best efforts by backfilling missing data from stored activities. It also gracefully handles authentication issues to output structured JSON with available anchors and pool sizes.

Riegel and VDOT are both used for running performance prediction. Riegel uses a fatigue factor based on distance, while VDOT calculates aerobic capacity; the predictor outputs structured JSON comparing both methods using your anchor effort.