About

The body is an engine. This is the lab.

The Splits Lab treats running as an optimisation problem. Fuel, training, kit and recovery can each be measured, and each has a body of research behind it.

The test subject is one amateur marathon runner chasing a sub-3 marathon on four runs a week around a full-time job and a family. Every number we post comes from his training logs or from published studies.

The first experiment is the Valencia Marathon on 6 December 2026, with a 2:57 target.

Brands and collaborators can get in touch through Instagram.