Looking for the hottest fitness trends?

Try sweating through a boot-camp workout class. Or lifting weights. Or doing exercises to strengthen your stomach and back.

These are among the top fitness trends for the coming year, according to the American College of Sports Medicine. The group surveyed more than 19,000 fitness professionals to come up with worldwide fitness trends for 2011, a survey the group has been conducting since 2007.

Boot-camp workouts, strength training and core exercises are among this year's top 20 trends. Pilates and balance training, listed in the past, didn't make the cut this time.

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