This article titled, Fit 50-Year-Olds As Fit As 20-Year-Olds Who Don't Exercise, is great news for us older athletes and something I suspected all along given the lack of exercise by, not only 20 year olds, but all ages. It was published in Medical News Today.
The lesson here is get out and start exercising. My favorite activities are Nordic skiing, bicycling, kayaking, Nordic walking, and if I have to work out inside, NordicTrack or an elliptical trainer if I am traveling.