You can see examples of it on playgrounds. And while the kids don't know it, all that jumping, leaping and skipping is part of plyometrics.

Kristen Wassung incorporates the power and strength moves into her workouts.

"It's high intensity," she says. "Gets your heart rate up -- gets you sweating. It's something to add to what you're doing."

Certified Fitness Trainer Lori Johnson uses the moves to help clients break through a plateau. Instead of adding extra weight for strength training, Johnson might recommend throwing a 10 pound medicine ball.

But while the technique can get results, it's not for everyone.

Lori says, "If you have any kind of joint injury, hip, neck, whatever, plyometrics might not be for you because it will vibrate through your body."

Another thing to keep in mind: there's a progression to the moves. From jumps over a resistance band to jumps over a cone -- then jumps over a bench. It becomes increasingly difficult.

Kristen says, "At the beginning it may be frustrating; hard. But once you get the hang of it, it's fun -- something to keep things new."

Another thing to keep in mind is that plyometrics is not for beginners. It's best suited for regular exercisers who strength train.