This new issue of Chewing magazine tells how to set up a mandibular fitness regime! Basically, they recommend interval training: chewing one piece of gum with lots of reps, followed by chewing five pieces of gum at once, so you can really work the masseter and buccinator muscles. It's a gruelling workout, but you build strength AND endurance, so you can come through in a clincher. I'm sure the glory makes it all worthwhile. Plus, you develop that "chewer's jaw" that drives the girls wild.