A study published in the American College of Sports Medicine's Health & Fitness Journal shows that high-intensity interval training (HIIT) burns more fat—abdominal fat in particular—than steady-state cardio routines (e.g., zoning out on the treadmill). Combining cardio and strength training, and switching between upper- and lower-body exercises, is an ideal way to keep your heart rate up and boost your body's fat-burning potential.
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