Through daily practise of tai chi and chi kung, as well as taking vitamin D and calcium supplements (if your diet is low in these), you can lessen your loss in bone density. The Harvard Medical School Guide to Tai Chi quotes research in this, with facts and figures...

A good basic exercise is to stand with your feet apart, knees bent, and arms as if holding a giant dinosaur egg. Do this every day, starting with as little time as you like - gradually increasing the time, as your legs and arms b...
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