Well Are You?
Health is more than simply being alive. Your health is directly related to your quality of life.
Regardless of your age, you would be healthy if it were easy bending down to tie your shoes, for instance, or standing up from most any chair or sofa without assistance of some sort.
You could consider yourself healthy if breathing were easy, walking a couple of miles was not an effort, and most importantly, your stomach doesn't bulge and your sides don't hang over your belt. You could consider yourself healthy if you are in at least the "good" range of the Body Fat Chart.