3 Moves, 5 Rounds, One Core-Crushing Workout
Men’s Health Fitness Director BJ Gaddour calls this 3-exercise circuit “tummy time.” In reality, however, it works so much more than just your tummy; It hammers your entire core—the dozens of muscles between your shoulders and your hips. (Get fitter faster with an activity or health tracker. Head to Best Buy to find the one that fits your needs and goals.)
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