pirx.ca
We designed and built the PIRX app and its machine learning. A runner connects the watch they already wear. PIRX gives a Projected Time for a race, a Supported Range around it, and the seconds each of five Structural Drivers adds: Aerobic Base, Threshold Density, Speed Exposure, Running Economy and Load Consistency. Personal models, including gradient boosting, learn each runner’s own patterns as their history grows. They are only used when they beat the app’s safe rules.