Brian MacKenzie is a strength and conditioning coach and the creator of Power Speed Endurance, which specializes in movement with an emphasis in running, cycling, and swimming mechanics. MacKenzie and his program have been featured in Competitor, Runner’s World, Triathlete, Men’s Journal, ESPN Rise, The Economist, Outside, and Tim Ferriss’ bestseller The 4-Hour Body. He has consulted with several athletic teams, including the 2012 Western Athletic Conference Champions San Jose State Women’s Swim Team. Connect with Brian on Twitter, Facebook, or through the CrossFit Endurance website.
T.J. Murphy is a veteran journalist, endurance athlete, CrossFitter, and former editorial director of Triathlete, Inside Triathlon, and Competitor magazines. He is author of Inside the Box: How CrossFit® Shredded the Rules, Stripped Down the Gym, and Rebuilt My Body; Triathlete Magazine’s Guide to Finishing Your First Triathlon; and contributor to Start to Finish: 24 Weeks to an Endurance Triathlon. His writing has also appeared in Outside magazine and Runner’s World. He is a five-time Ironman® finisher and a 2:38 marathoner. Connect with T.J. on Facebook or Twitter.