Welcome to Fuel School 101. Yes, there’s a science to properly fueling the body for competition. High school athletes, take notice. For this article, I’ll focus on the ubiquitous energy bar, which has grown into a multi-billion dollar industry. San Benito High junior three-sport standout Marisa Villegas loves Clif Bars; last year at the end of the track season, Villegas told me in addition to her regular meals, she sometimes ate two to three Clif Bars a day during her most intense workout sessions/races (hey, when you run as fast as she does, you need some serious fuel).