You can’t just sprinkle whey powder on your pecs. Exercise scientists Colin Willborn, Ph.D., of the University of Mary Hardin-Baylor in Texas, and Oliver Willard, Ph.D., of the University of Stirling in the U.K., help us explain how eggs become abs.

* By K. Aleisha Fetters, Illustrations by Mike McQuade, Animation by Giant Ant, Art Direction by Thomas O’Quinn