If you're the type to run all over the place with things to do and find yourself frequently making the excuse that you have "no time for the gym," the answer is a fast-paced (and fast), body-weight circuit. We asked Andy McDermott, a featured athlete in Muscle & Fitness magazine and owner of Iron Cross Fitness for his go-to fat-burning circuit. Now, you've got no excuses not to get a workout in.

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