Fitness Trends: Pros and Cons of the Top 11

Choosing the best exercise for your body, personality and lifestyle is no sweat if you know the best and worst parts of popular workouts. We've interviewed a dozen fitness experts about everything from anti-gravity yoga to "exergaming"—and here are their biggest likes and dislikes.

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Boot camp

By Laurie Pawlik-Kienlen for MSN Health & Fitness

Based on military-style training, boot camps combine the instructor's expertise with the support (and/or peer pressure) of other participants. The drills range from power skipping to reverse flies, all to increase cardio, strength and core fitness.

Pros: "Because the exercises are infinitely combinable, each workout is new," says Karen Rooff, a certified personal trainer in Austin, Texas. "Novelty is great for keeping both muscles and minds engaged. Plus, classes with small numbers offer a trainer's personal attention at a fraction of the usual cost."

Cons: "Participants may overestimate their fitness level, overdo it, and stop working out," says New York City–based certified personal trainer Ariane Hundt. "And, high- intensity workouts can cause injuries if the instruction isn't personalized." To avoid injury, listen to your body and inform your instructor of any pre-existing injuries or conditions, and don't be afraid to modify any moves if they're too difficult for you.