What is Old?

"85% of Americans aged 40-90 say they are not old yet." AARP

This study of over 1800 people also revealed that most people over age 50 think they are not like most people over 50.  The study also reveals that the older people get the less hampered they feel by their bodies, which is odd since aging does take a toll on the physical body.  So, how do you feel about getting old?  I just read about one way to determine fitness:  getting up from sitting flat on the floor without using hands or knees or any body part.  That is quite a fitness test as one grows older, but it is always worth striving for physical mobility and fitness.