Bob Fleshner is a personal trainer certified by the National Strength and Conditioning Association. Bob has coached numerous marathon runners, helping them to: run their first marathon; achieve personal bests; and qualify for the Boston Marathon. Bob has completed 21 marathons, qualifying for Boston three times. In addition, Bob has been a youth coach for 16 seasons and continues to coach youth basketball. He is certified to be a high school coach in the state of Maryland.

Prior to forming Xtend Fitness, Bob held a number of senior corporate positions. Most recently, he was the East Region President for a division of United Health Group that focused on Medicare. Immediately before that, Bob was the President and CEO for United Healthcare of the Mid-Atlantic with responsibility for commercial insurance in Maryland, Virginia, Washington, DC and a part of Delaware.

Before joining United Health Group, Bob started and operated an Internet company devoted to continuing education for dentists. Bob began his professional career as a lawyer and spent nearly nine years working for Ringling Bros. Barnum and Bailey, where he was Vice President of Legal Affairs.