HIIT, or high intensity interval training, is all the rage for burning mega calories in a short amount of time. If you're up for short stints of intensive cardio exercise with quick recovery periods in between, it will have wonderous effects on your cardiovascular and metabolic systems. And hey, Olympic speed skaters swear by it!

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In 2011, when a fitness instructor named Alberto accidentally forgot his usual cardio music, a latin-inspired dance legend was born (yes, really). Go shake your hips and wave your arms in the air like you just don't care. And don't worry about your actual skill, it's the fun bachata, rumba, salsa and Bollywood rhythms that will have you sweating and smiling for an entire hour.

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Wanna look sexy and get a workout doing it? Then hop on some pole fitness. You'll be surprised just how many muscles are involved in getting you hanging upside-down twirling about that pole... but soon you'll be the Coyote Ugly of your dreams.

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