Apr 17, 2014 1:32 AM GMT
NYT: As many of us know from woeful experience, our skin changes as the years advance, resulting in wrinkles, crow’s feet and sagging skin. This occurs because of changes within our layers of skin. After about age 40, most of us begin to experience a thickening of our stratum corneum, the final, protective, outer layer of the epidermis, itself the top layer of your skin. The stratum corneum is the portion of the skin that you see and feel. Composed mostly of dead skin cells and some collagen, it gets drier, flakier and denser with age.
At the same time, the layer of skin beneath the epidermis, the dermis, begins to thin. It loses cells and elasticity, giving the skin a more translucent and often saggier appearance.
Exercise not only appears to keep skin younger, it may also even reverse skin aging in people who start exercising late in life, according to surprising new research.