Health/Beauty Trivia : Getting older one year by lying two days
Muscle weakness is a significant factor of the aging.
Even if an adult is ordinarily living, the muscle strength is declining gradually.
The muscle strength falls 1 % a year by an average from thirties.
It is during we lie down when we do not use muscular strength.
0.5% of muscular strength decreases in a day when we keep lying down.
In two days, it is decreased by 0.5% * 2 = 1%.