How exercise can keep aging muscles and immune systems 'young'
from The New York Times
Remaining physically active as we grow older could help to keep our muscles and immune systems robust, according to two inspiring new studies of older recreational cyclists. Together, the experiments add to growing evidence that some of our assumptions about aging may be outdated and we might have more control over the process than we think. Aging often seems inexorable and unvarying, and, in chronological terms, it is. The years mount at the same pace for each of us.
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