And just as you say, there are certainly "seasons" in life where one is more prone to falling. I just fell again on this past Saturday night, and I didn't even remember it, despite a bottle of Tylenol falling on the floor and a huge bruise on my right knee.

I think it can definitely get worse the more one withdraws from human contact. And I think even very casual contact, of randomly saying hello to anyone, can make a good difference.