This no-equipment exercise strengthens your abdominal muscles. Lie on your back with your knees bent. Put your hands behind your head and pull your elbows back. Exhale as you slowly curl your torso toward your thighs until your upper back is off the floor or mat. Hold for a count of three — add more time as you get stronger. Inhale as you lower your body back down to the mat. Your workout routine should include 10 to 12 reps and two to three sets to start.
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