ham.run

Open-source marathon physiology calculators for endurance runners. 12 tools: race time prediction (Riegel model), pacing strategy, fueling plans, running economy analysis, caffeine protocols, heat acclimation planning, periodization comparison, and grade-adjusted pace. Strava-connected tools for training load and activity analysis. All models are citation-backed from peer-reviewed exercise physiology research. Stateless tools work without authentication at ham.run.