Muscle loses size and strength as we get older, which can contribute to fatigue, weakness and reduced tolerance to exercise. This is caused by a number of factors working in combination, including:
Muscle fibres reduce in number and shrink in size.
Muscle tissue is replaced more slowly and lost muscle tissue is replaced with a tough, fibrous tissue.
Changes in the nervous system cause muscles to have reduced tone and ability to contract.
Facial aging includes skin sagging and the loss of deeper substructural volume of fat and muscle. As the average life expectancy is extended, a youthful appearance is becoming more important, and substantial efforts are being made to improve and correct facial aging.
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