Variations on rotational crunches include using exercise bands in a lower position. Exercise abdominal muscles with tips from a personal trainer in this free video on advanced playground exercises.
Expert: Tina Anderson
Bio: Tina Anderson is a mother of three, a personal trainer and created The Playground Fitness routines based on work-outs for moms, grandparents and other caregivers taking children to the park.
Filmmaker: Nili Nathan
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