Get motivated! Iron Man Jack Nunn shares fitness, nutrition and training information. Avid triathlete and Iron Man competitor, Jack Nunn has spent his life in the spotlight of competitive sports. He developed Roworx, a full-body workout that utilizes indoor rowing machines, and also TriCore Indoor Cycling, a unique workout designed for the Evo Fitness Bike. Join Jack each week for nutrition, coaching and tips to achieve optimal fitness.