Judi Sheppard Missett is an American fitness expert and entrepreneur, best known for founding the popular dance fitness program called Jazzercise. She created this unique blend of jazz dance, resistance training, Pilates, yoga, and kickboxing in 1969, which has since gained a global following. Over the years, Missett has expanded Jazzercise into a successful franchise, offering classes in various formats and styles. She has also authored books and produced fitness videos, contributing to her reputation as a leader in the fitness industry. Her work has inspired many to embrace a healthier lifestyle through dance and exercise.