For a stronger back, try this balancing act

For a challenging way to train your back and gluteal muscles, do this move on a flat, padded surface; for more intensity, try the exercise on a Bosu trainer. It will help you develop core strength, stability and balance.

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1 Lie face down on an exercise mat or a Bosu trainer; center your pelvis and lower abdomen on the dome. Rest your arms alongside your body with your palms turned up. Straighten your legs behind you with your feet shoulder-width apart.

2 As you exhale, slowly bend both knees and reach your arms back, attempting to touch your fingertips to your heels. Look forward as you hold this position and balance yourself on the ball or floor for 10 seconds. Return to the starting position and relax for 15 seconds. Repeat the exercise three more times.

-- Karen Voight