You would use a single fixed pulley in order to change the direction of the load. For instance it might be easier to pull down on a rope through a pulley to lift something than to pull up on the rope directly just because of the way our bodies work,
Recorded on October 5, 2009 using a Flip Video camcorder.
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Studies show that loss of cervical curve and poor posture often lead to progressive disc degeneration, osteoarthritis, tension on the spinal cord and nerve roots, as well as anterior head translation. In fact, a translation of even a single inch may increase work for the posterior neck muscles by a factor of ten.
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