I came across a blog article that surprised me:
http://www.katysays.com/sit-down-stand-up/

Apparently your ability to sit down onto the floor and rise again without any assistance from other body parts can predict longevity:
http://www.nbcnews.com/health/can-you-do-simple-sitting-test-predicts-longevity-1C7588565

I was slightly horrified to discover that I can't get back up off the floor without using my hand.

What are your thoughts on this, ladies and gentlemen?