J-Rod

[proffate]

Re:

He's certainly not slowing down as much as should be expected of someone his age.

Do you have any science that describes how much slow down one should accrue with age? All I've read is claims like

In 1987, Dr. Michael Pollock and his colleagues at the Mt. Sinai Medical Center in Milwaukee, Wisconsin, reported a watershed finding in the understanding of performance and age. Dr. Pollack reported an astonishing finding that lent further credibility to the idea that very strenuous exercise was an aerobic capacity preserver. Well-trained, competitive endurance runners with an average initial age of 52 were able to totally maintain VO2 max values over a 10-year period.

Of course vo2 max isn't everything, there's also neuromuscular and anaerobic decline, which Purito has certainly shown in the last few years.