11. Plank It!

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Lie face down and rest on your forearms. Push your body off of the floor resting your body weight on your elbows and toes. Keep your back in a straight line with your head and toes. Tilt your pelvis and then hold for about 20 seconds. Lower back to floor and then repeat several times. See how long you can hold the plank position without bending! Whew!

Try Sit-DOWNS, Too
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