ABOUT INTRVL

Science-backed training for every runner

Our Mission

INTRVL brings science-backed training methodologies to runners of all levels. From complete beginners to elite athletes, we provide personalized training plans based on proven research from the world's greatest coaches.

Why INTRVL?

Evidence-Based

Every workout and training plan is backed by scientific research and proven methodologies.

Personalized

Training plans adapted to your current fitness level, goals, and schedule.

Accessible

World-class training knowledge available to everyone, completely free.

The Science

Our training plans incorporate methodologies from legendary coaches including Arthur Lydiard, Jack Daniels, Pete Pfitzinger, the Hanson Brothers, Jeff Galloway, and Dr. Phil Maffetone. Each approach is research-validated and proven effective for thousands of runners worldwide.