BY SANDRA GUY

It’s tough to think of sleep and rejuvenation amid a global pandemic.

But as you try to keep a healthy schedule while homebound, put sleep at the top of the list – and not just to feel better.

Six to eight hours of uninterrupted sleep helps repair cells and tissue.

Think of it as a facial for men and women – only in this case, it’s an essential daily health routine rather than just an occasional treat.

A new scientific study, published in Nature Cell Biology, revealed that collagen — the most plentiful protein in the body — contains two types of rope-like forms, one thick and the other thin.

Collagen is one of the major building blocks of skin, bones, muscles, tendons and ligaments, and is found in eyes, teeth and blood vessels.

Biologists at the University of Manchester (U.K.) who tested mice found that the thicker structures are permanent, according to the published study. The thinner ones break as we move and work during the day, but regenerate as we sleep.

Other researchers in France are developing a sort of construction material from collagen to replace and repair damaged blood vessels.

So challenge yourself to stay rejuvenated. You can use a fitness tracker to keep upping your game.