Mike, I still do cardio at least 2-3 times per week.I agree with the low impact type as my joints dont hold up like they use to. I have been a swimmer all my life since I was 5 and all through college. I swim at least 1.5 miles for my cardio workout. Does one hell of a fine job on the back and tris as well. Swimming is what I contribute the width of my back is from.