Fueling knowledge.

Science-based articles for runners who plan seriously.

All DIY Fueling Fueling Science Race Strategy Hydration

A natural, dye-free fueling syrup made from table sugar and fruit using the oleo saccharum method — no special ingredients required.

A simple, cost-effective DIY gel recipe for runners who want to fuel long runs without relying on expensive store-bought products.

Learn the science behind carbohydrate intake during long runs and races, and how to calculate your optimal fueling rate.

The physiological reasons behind the dreaded bonk at 25 kilometers and how proper fueling planning prevents it.

How to plan fluid intake for trail runs and ultras, accounting for elevation, weather, and aid station spacing.