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Fastest Fat Burners Ever!

Whether you're working out at the gym or at home, burn calories and erase flab with these 20 fast fat-burners.
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Go hard and make it quick

Staying at 80% of your max heart rate for 40 minutes can amp your metabolism for 19 hours afterward, research published in Obesity notes. And doing a shorter workout at 75% of your max aerobic capacity will give you a greater metabolic boost than sweating longer at 50%, a Colorado State University reveals.

Next: Lift dumbbells … slowly

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