Ever notice – as you grow older – that things just seem to get heavier? Ever watch a person of advanced age struggle to hoist a carry-on bag into the overhead compartment of an aircraft?
As we age, our muscles become weaker. It starts at around age 40 and progresses until 75, when muscle strength pretty much falls off a cliff.
Doctors recommend exercise to counter the loss, but it inevitably progresses. Some people have tried hormone supplements – testosterone, human growth hormone and insulin-like growth factor-1 to hold off Mother Nature.
But the long-term safety of those therapies is in question.
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