Well, I'm only 69 at the moment, but agree with you completely. I am more of an avid runner than a cyclist -- it's something that I can do year-round in these parts -- and tend to look on my cycling as cross-training for the running events I participate in a few times a year. I also do strength training at the gym at least once a week in the summer and several times a week in the winter. I'm not much of a swimmer, but I do understand the benefits and during the winter I usually go about once a week to a place where I can swim laps in the pool.

Like I said, I'm not quite in my 70s, but don't see any reason why I won't be doing mostly these same activities for years to come.