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Only takes 4 minutes, but its the longest 4 mins of my life: Burns as many calories as a 40-60 minutes run. Makes your body adapt and improve very quickly. Increases metabolism for up to the next 36 hrs. Takes only FOUR minutes, Developed by a Japanese Scientist. NO EXCUSES..
Shape Up: My 30-Minute Workout - I must admit i have only done this once, but plan to do it again and on a regular basis...i know it works after the first time I could not walk properly for a couple of days! got to keep it up!