Michael Israetel, PhD, is the cofounder and chief content officer of RP Strength (Renaissance Periodization). With a doctorate in sport physiology from East Tennessee State University, he is also a former professor at Lehman College, Temple University, and the University of Central Missouri, where he taught a variety of exercise science courses related to nutrition as well as strength and hypertrophy. Israetel worked as a sports nutrition consultant for the U.S. Olympic training site in Johnson City, Tennessee, and has been an invited speaker at numerous scientific and performance conferences worldwide, including nutritional seminars at the U.S. Olympic Training Center in Lake Placid, New York. He has coached numerous athletes in diet and weight training and is also a competitive bodybuilder and professional Brazilian jiujitsu grappler. He is the coauthor of The Renaissance Diet 2.0, Scientific Principles of Hypertrophy Training, Scientific Principles of Strength Training, Recovering From Training, How Much Should I Train?, and The Minicut Manual. Jared Feather is the head physique and bodybuilding specialist at RP Strength. He holds a master’s degree in exercise physiology from the University of Central Missouri. With over 10 years of experience in competitive bodybuilding and coaching, he has earned esteemed titles such as IPE and NFF Professional Natural Bodybuilder. In 2020, Feather placed first in the classic physique division at NPC Nationals, earning him International Fitness and Bodybuilding (IFBB) Pro status. He is also the coauthor of The Scientific Principles of Hypertrophy Training and The Minicut Manual. Christle Guevarra, DO, is a former champion powerlifter. She currently maintains a telemedicine private medical practice and serves as an official traveling team physician for U.S. Figure Skating. She is also the production operations manager at RP Strength. Guevarra holds a bachelor’s degree in chemistry and minor in mathematics from San Francisco State University, a master’s degree in organic chemistry from University of Wisconsin at Madison, and a doctorate of osteopathic medicine from Western University of Health Sciences. Passionate about education, she was awarded a predoctoral teaching fellowship at Western University of Health Sciences, where she taught first- and second-year osteopathic medical students. She completed her family medicine residency at Crozer Health in Pennsylvania, where she was named Resident of the Year. She then completed her sports medicine fellowship at the University of Nevada at Las Vegas, where she worked with Division I football players, professional athletes, and recreational athletes.
