Excellent article -- thanks! I just started running last year, at 46. I have no desire to race or run marathons, but it's rewarding and fun taking up a new sport and finding that I can improve with training even at my (relatively) advanced age. It's still a lot harder than cycling or hiking, but I enjoy it. I like that it is good for my bones, and I feel excellent after a run! I plan to keep on running and cycling as long as my body can take it.
It's so sad to me that my mom (in her 70s) won't even take walks, and as a result, she's really starting to slow down and show her age a lot more. She thinks it's too late to do anything to improve or to feel better. She's wrong, but she won't listen to me as she thinks I'm just an exercise fanatic, and what works for me couldn't possibly apply to someone like herself. This article shows it's never too late to start -- but if I sent it to her, it would just piss her off. I've tried many times before, but I've finally given up. 
Emily
Emily
2011 Jamis Dakar XC "Toto" - Selle Italia Ldy Gel Flow
2007 Trek Pilot 5.0 WSD "Gloria" - Selle Italia Diva Gel Flow
2004 Bike Friday Petite Pocket Crusoe - Selle Italia Diva Gel Flow