Athlean-RX X-Cite scored a 95% in nutritional value according to our analysis. Discover the nutritional and dietary supplements that are right for you online today at Labdoor. May 24, 2018 The Athlean-X fitness program was originally invented by Jeff Cavaliere. He is a fitness guru and a personal trainer of most celebrities and athletes such as David Wright and Terell Owens. He was also once the head physical therapist of the New York Mets, a professional baseball team.