[entropy12]

I believe that entirely. Everything degenerates with age.

So exercise becomes even more important with age.
When one sweats, one loses salts including potassium.
I am convinced only reason I have avoided heart problems
is regular walking exercise. My father and uncles all succumbed to heart disease, and I believe lack of exercise was the main cause.

[greeneyes]

You could be right. Excercise is important and walking is one of the best.