Power, Speed, Endurance is a highly effective training system that has catapulted thousands of endurance athletes to the next level. Developed by CrossFit Endurance founder Brian MacKenzie and featuring instruction from some of ... Zobraziť viac
In Unbreakable Runner, CrossFit Endurance founder Brian MacKenzie and journalist T.J. Murphy examine long-held beliefs about how to train, tearing down those traditions to reveal new principles for a lifetime of healthy, powerful running... Zobraziť viac
