India, May 24 -- By Dr. K. Javeed Nayeem, MD

Centuries are what history is made up of and centuries are what any cricketer would like to quickly pile up, in the basket of his achievements and a century is what most people would love to live for, although very few of us live long enough to get there.

But living for a full century, which is longed for by most, does not come easy even for most of the people who are destined to cross that milestone. To be able to live long, in good health, without being confined to a hospice bed or even to your own bed at home, is what constitutes the real and much longed for joy of living long.

To enjoy living for a hundred years, you have to reach that goal by being able to at least get around your own h...