I run nearly every day, I've run 5K's every weekend during June and July and Century Rides every other weekend (and have finished 12 so far this year); while I am training for this little triathon that I want to do. I think I qualify as some who has some degree of cardio ability.

My biceps are only 14 inches; but, I don't need them to be any bigger than that!

Like it's been said: Other than weightlifting, if you would like to participate in any other physically-active sport, hobby, or recreational activity; cardio is a part of it! If you have all the cardiovascular health that you need and you don't want to participate or improve your participation in any of these events; well then great, do your own thing.

J.