Bí quyết giúp xương vững chắc
Cập nhật: 10:31 27/10/2012 GMT+7
(TNO) - Thường xuyên đi bộ, chạy bộ, chơi quần vợt có hiệu quả trong việc duy trì mật độ chất xương ở chân và xương sống.
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