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Don't just swing your legs; focus on "crunching" your ribs toward your pelvis.

How: Lie flat and lift your shoulders and legs slightly off the ground, forming a "banana" shape. Keep your abs tucked in tight. Don't just swing your legs; focus on "crunching"

Goal: Raises the heart rate to help burn the fat layer covering the abdominal muscles. Don't just swing your legs

How: From a forearm plank, bring your right knee toward your right elbow, then switch. Goal: Combines static hold with active muscle contraction. Don't just swing your legs; focus on "crunching"