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To evaluated the effects of the 24 movements Tai Ji exercise on bone structure and function. Broadband Ultrsonic Attenuation (BUA) and velocity of sound (VOS), bone formation marker Osteocalcin (OSTN) and bone resorption markers urinary Pyridum crosslinks (PYR and D-PYR) were studied before and after four months of Tai Ji exercise. Improved bone structure and increased bone density in menopausal women were reflected by BUA results. The increased BUA appears to be associated with increased bone formation rather than decreased bone resorption.