Jacko is a fantastic coach, who's been part of my coaching team that supported me to multiple gold medals and world records. Learning to breathe better is a game changer for your running.

Richard Whitehead MBE, Paralympic champion and world record holder

A breathwork mentor to elite athletes

The New York Times

Jacko's breathwork helped me defend my world title. Because I was always in control of the effort, I was in control of my body and in total control of my mind. It meant I could relax, enjoy and express myself on the world stage.

Sam Ruddock, Double World Champion Para Cycling

A thorough and highly practical guide to breathing for running. It will spark important conversations and influence progress in the sport for years to come … Jacko's book is not only a guide to running. It is a guide to living well through breath. When used consistently, these practices can unlock easier pace, more enjoyable runs, better recovery and a deeper sense of flow.

Patrick McKeown, author of The Oxygen Advantage

I've been running marathons and coaching marathon runners for 40 years and never once has someone like David (an expert in breathing) explained to me and showed me how I can improve my breathing … David's book has educated me on that! In fact, he's taken me right back to school. In this book he presents the benefits of breath mastery with simplicity and clarity and has really made me think that learning to understand more about harnesses breath is something that runners can't afford not to do if they want their running to be better.

Dr Martin Yelling, coach, runner and author

A fantastic guide and learning tool

Bob Stewart, England Rugby Medical Lead Men's Senior Team