Mark Klion, MD, is a board-certified orthopedic surgeon with specialty training in sports medicine. After receiving a bachelor's degree from St. Lawrence University, he went on to obtain his medical degree from the Mount Sinai School of Medicine. He completed his residency in orthopedic surgery at Mount Sinai Hospital. He then completed a fellowship in sports medicine at the University of Chicago, where he gained specialization in arthroscopic surgery and reconstructive knee and shoulder surgery. Klion is a clinical instructor at the Mount Sinai School of Medicine and is an active member of the shoulder and sports medicine service. He serves as an educator for the medical school and the department of orthopedic surgery. He is also the director of orthopedics at St. Barnabas Hospital in New York, a level II trauma center. Klion has participated in 11 Ironman triathlons, including Hawaii Ironman 2000 and 2001. He has completed 15 marathons in addition to many ultradistance running and biking races. He serves as the medical director for the New York City Triathlon. He has published numerous articles on sports medicine issues and has appeared on both regional and national radio and television programs. He is active in the triathlon and endurance community, providing lectures about sports-medicine-related issues to local clubs and groups. Jonathan Cane, better known as Coach Cane, has been coaching endurance athletes for over 30 years. He is the cofounder and head coach of City Coach, a running and triathlon coaching company, where he coaches athletes ranging from beginners to world champions and world record holders. He holds a master's degree in exercise physiology from Adelphi University. In addition to his work with City Coach, he has coached for Nike, JackRabbit, and Under Armour. Cane is the coauthor of The Complete Idiot's Guide to Weight Training and has written for MetroSports Magazine, NY Runner, and Triathlete Magazine. He has been a featured speaker for Nike, New York Road Runners, Chelsea Piers Triathlon Club, Hospital for Special Surgery, and more. Cane is a former Cat. 3 cyclist and on rare occasions can still be seen competing in multisport events. He lives in Bronx, New York, with his wife, triathlete Nicole Sin Quee (aka Mrs. Coach Cane); their son, Simon; and their pit bull, Lola. For more information, visit Coach Cane's website and follow him on Instagram (@coachcane) and Twitter (@realcoachcane).