Brian MacKenzie is a human performance and movement specialist. After training for ultra endurance marathons and Ironman events and experiencing physical breakdown he analyzed traditional endurance training methods used by triathletes and runners, as a result he went down a path of creating training programs that reduced endurance training and increased strength and technique training. Topics discussed in the podcast interview: Power Speed Endurance 3 Fu3l Habit XPT Power Speed Endurance book Unbreakable Runner book