About Fitz Koehler Noisy. Bossy. Compelling. Fitz Koehler is among the most prominent and compelling fitness experts and race announcers in America. With a Master’s Degree in Exercise and Sport Sciences and decades of experience teaching fitness worldwide, Fitz has helped countless people live better and longer by making fitness understandable, attainable, and fun. She has spent decades building her brand and business, FITZNESS, and has earned global reach and financial freedom. Her mission to help others live better and longer never changes, but her tactics frequently do. Fitz is the author of multiple books, including the Cancer Comeback Series, which includes: My Noisy Cancer Comeback: Running at the Mouth, While Running for My Life Your Healthy Cancer Comeback: Sick to Strong Healthy Cancer Comeback Journal