Evidence-based guides on marathon training, nutrition, physiology, and race strategy. Built by runners, for runners.
Understand the fitness-fatigue model: how fitness, fatigue, and form are tracked, how the acute-to-chronic workload ratio (ACWR) flags injury risk, and how to use training load for smarter decisions.
Learn what running power is, how it differs from pace and heart rate, and how to use power zones to train smarter for your marathon.
Learn how heart rate zones work, how RunVector calculates your personal zones, and how to use the 80/20 principle to train smarter for your marathon.
