To do an abdominal stretch, start by finding a balance ball. Place the balance ball on the floor and have a seat. Make sure that your abs are clenched and that your feet are flat on the floor as you move our back onto the ball. Your back should be the only part of your body that is touching the ball. Let your arms fall over your head and press your belly button to the ceiling. Hold the stretch for 20 seconds and then use your abs to roll up to your original sitting position.
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