I am 84 and have been active all my life - running (4 marathons), climbing and cycling, and I can tell you, you will lose physical capabilities eventually.  But I am really glad I was active in my younger days because today I am in reasonably good basic health, attributed to the earlier active life style.  I still hike regularly, but my pace is about one half of what it was just a few years ago....

Do as much as you can for as long as you can and enjoy the benefits!!

I would also say that with advancing age comes more visits to the doctor.  if you haven't already, get a good primary care doctor and see hi'm or her regularly.  I would be pushing up daisies now if I hadn't done this.

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