Twelve minutes—that is all that it takes to kick your metabolism into high gear and build lean, strong (read: sexy!) muscle.This time-efficient high-intensity interval training workout is the perfect routine for women who want to see and feel results fast. Better yet, there is no equipment required: All you need is a timer, a mat, and your own bodyweight.The workout includes your warm-up and cool-down, and synergistically combines strength training and cardiovascular conditioning to target every major muscle group while keeping your heart up. So there’s no need to jump onto a cardio machine or lift any weights after 12 minutes—when you’re done, you’re done!

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Alternative to Insanity Workout: 12-Minute Plyometric HIIT … – Shape

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