My brother in law is a National Guard JAG who, at 42, just finished Airborne at Benning. He is an ultra marathoner ( 50-100 mile runs through mountains and deserts) but still found the course a challenge for his 42 year old body. Military.com had him contribute to a fitness column about preparing for Airborne School. The second link is his blog while going through Airborne last month. If you are thinking of Airborne, or a similar program, these are good reads.
http://www.military.com/military-fi...airborne-for-old-guys-story-from-troops?wh=wh
http://hyperphil.wordpress.com/
http://www.military.com/military-fi...airborne-for-old-guys-story-from-troops?wh=wh
http://hyperphil.wordpress.com/