A fighter's greatest fear isn't having his teeth knocked out or landing facedown on the canvas in front of an audience of millions—it's getting tired. A lack of endurance is as much a danger to your quest for a leaner, stronger body as it is to a UFC fighter (although you probably don't risk suffering a beat-down if you punk out).

If you can't catch your breath after a set, or if you're too fatigued to hit the exercises in the late stages of your workout with intensity, you'll sacrifice strength and the number of calories you burn. Simply put, you won't lose much fat. But MF is in your corner to help you turn things around with a fat-burning, endurance-bolstering program inspired by routines the world's top mixed martial artists use to keep in fighting shape.

While you may never venture into the Octagon to wage combat, training like a fighter is a fun and challenging way to get a lean, athletic look, not to mention plenty of functional strength. Every exercise you perform is a compound movement, meaning it will work lots of muscle at multiple joints, helping increase your energy expenditure remarkably. As a result, your body will continue burning calories—mostly from fat—at an accelerated rate for up to two days afterward.

To accomplish that, the workouts here keep rest periods to a minimum while the weights you lift will be brutally heavy. You'll also do plenty of old-school fight-training exercises, such as the clean and press, medicine-ball situp, and jumping rope—all of which will help give you the staying power needed to fight off fat and go the distance in future workouts and sports activities.