Science
Science-based articles on endurance coaching, performance metrics, and data-driven coaching principles.
ECOs vs Training Stress Score: A Guide for TSS-Fluent Coaches
See how ECOs and Training Stress Score handle training load differently, where they agree, and how to translate your TSS intuition for any endurance sport.
ECOs Training Load Explained: A Coach’s Guide to Objective Load Equivalents
Learn what the ECOs training load score is, how Objective Load Equivalents weigh swim, bike, and run, and how to read your athlete’s numbers.
Why Technology Can’t Replace Sports Coaches
Can AI replace coaches? AI writes plans and reads your data well, but it can’t see the warm-up limp or keep an athlete showing up. Here’s the honest answer.
Running Warm-Up: Why the Same Routine Doesn’t Work for Every Session Type
Build a running warm up routine that scales by session type. Easy days, tempo, intervals, and race day each need a different warm up before running.
Base Training in Running: How Long the Aerobic Foundation Takes to Build (and What Erodes It)
How long does base training running take to build, and what erodes it when you stop? A coach’s guide to the aerobic timeline, ramp rates, and detraining.
Interval Training for Running: Workouts to Improve Speed
Running interval workouts, done right. Learn which types build speed vs. endurance, how to fit them into your week, and the mistakes that stall progress.