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YouTube www.smartstretch.com Active Isolated Stretching (AIS) & Core Strengthening Sequence for the Psoas-Iliacus (Hip Flexor). Strengthens Abdominals, Gluteus Maximus, and Hamstrings. For more information and latest in stretching technology, please visit us at www.smartstretch.com

Original article and pictures take http://www.youtube.com/watch?v=yfswfLuW_tI&feature=share site