Muscle and bone are physiologically interconnected, but joint changes of muscle and bone with aging, and whether the muscle-bone changes are different by sex and by country has been little studied. We examined longitudinal associations of bone mineral density (BMD) and muscle mass or muscle strength in community-dwelling 65 years or older in the United States and Japan.

中文翻译：

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肌肉和骨质流失之间的纵向关联：美国和日本队列研究的结果

肌肉和骨骼在生理上是相互关联的，但随着年龄的增长，肌肉和骨骼的关节变化，以及肌肉骨骼的变化是否因性别和国家而异，却鲜有研究。我们研究了美国和日本社区居住的 65 岁或以上人群的骨矿物质密度 (BMD) 与肌肉质量或肌肉强度的纵向关联。