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MPEG-1  |  2005-01-05  |  5.0 MB  |  352x240  |  29.97fps  |  16 seconds
Transcription: To perform the ball back extension, simply lie over a stability ball with your abdominals drawn in. Curl around the ball and then engage your glutes to lift your body up off of the ball to maintain a neutral position at the hip. Repeat for the desired amount of repetitions.