Muscle & Fitness and Force Factor have teamed up to offer a special prize to M&F followers with the leanest, meanest abs this Spring in our official #LeanBurn Instagram contest. One lucky winner will receive a Force Factor stack, plus Force Factor swag, including a t-shirt, drawstring bag and water bottle. Get the complete official rules here.

For a workout to jumpstart your fat loss and make those abs pop, try:


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