Science
Science-based articles on endurance coaching, performance metrics, and data-driven coaching principles.
Triathlon Training Load with ECOs: How to Track Swim, Bike, and Run
Learn how ECOs measures triathlon training load across swim, bike, and run, how bricks and races score, and what athletes log weekly.
Fartlek Training for Running: How to Program Effort-Based Speed Work
Learn what defines the fartlek training running session, how much structure to prescribe, and where it fits in the week.
Running Speed Training: How to Develop Speed as a Trainable Quality
Running speed training builds speed as a trainable quality. Learn the three speed types and which workout fits each athlete.
Carb Loading for Training, Not Just Race Day
Carb loading for training isn’t just a race-week ritual. Learn to fuel key sessions, time carbs right, and cut GI issues with simple swaps.
Running Periodization: The Structural Decisions Behind an Effective Training Plan
Running periodization is more than base, build, peak, taper. Learn the four structural decisions that make a running plan work.
Training Zones Explained: What the Science Defines and How Coaches Apply It
Training zones explained for endurance coaches: what the science defines and the four anchors behind every zone.
Running Cadence Training: How to Use Step Rate Without Chasing 180
Running cadence training works best when you read step rate as a signal, not a target. Learn when to raise cadence, when to leave it, and how to coach it.
Running Form Training: The Cues That Change How Athletes Move Under Fatigue
Running form training that survives fatigue. Learn which cues actually transfer, how to fix collapse patterns, and where form work fits the week.
Reading Your Performance and Training Load Balance Graphs
Learn what the Performance and Training Load Balance graphs measure, the science behind fitness, fatigue, and form, and how to read external training load.
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.