David Warden and Matt Fitzgerald are the founders of 80/20 Endurance, one of the pioneers of endurance training plans. 80/20 sold its first plan within the TrainingPeaks Marketplace in 2005. Their plans have helped hundreds of thousands of athletes of all experience and ability levels achieve their goals.

David Warden is an internationally recognized coach and author with clients including world champion age group racers, duathlon champions and multiple Ironman World Championship qualifiers. He is the co-author of "Triathlon Science," the industry standard for triathlon coaches, and "80/20 Triathlon."

Matt Fitzgerald is an acclaimed endurance sports coach, nutritionist and author, haven written over 30 books, including "The Endurance Diet," "80/20 Running" and "How Bad Do You Want It?"

Matt and David sat down with Dirk to talk all things training plans. From valuable insight for coaches making and selling programs to advice for athletes choosing a plan, it's a must-listen for anyone using training plans. Plus, the 80/20 duo reveal some exciting plans for coaches and athletes looking to advance their skills in the endurance athlete world.