the loss in appendicular muscle and bone mass with increasing age is a well-defined event (4, 11). While this event has been acknowledged for centuries, in vivo data to quantify the degree of age-related changes in muscle and bone mass have only become available, primarily due to new imaging technologies, in the past two decades. Investigators in these fields of research even gave names to the age-related conditions: sarcopenia and osteopenia. The placement of specific names has sparked research into discovering the causes and consequences in hopes of developing interventions for reducing the burden of these conditions.
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