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Old 08-16-09, 07:54 AM
  #16  
Pat
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Join Date: Jan 2002
Location: Orlando, FL
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I know a lady who was an avid runner. She switched to cycling after blowing out her knees. She is over 50. She was worried about osteoporous. She said that she read that one needed only a little impact daily to stress ones skeleton enough to get the benefit. As I recall, it was hopping about a dozen times daily. A short jog for even a few yards daily would be enough.
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