Why: Increases oblique and ab strength.
How: Lie on your back with your legs straight and your arms spread out to the sides. Lift your legs until they are perpendicular to the ground. Lower your legs to the side until your feet are about a foot above the ground. Hold for two counts. Lift your legs to the starting position. Repeat on the opposite side and continue in alternating fashion for the specified number of reps.
Sets/Reps: 2×5 each side
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