I really like this guy, in response to the age question:
Bernie Sanders, who would be the oldest person ever elected president if he wins in 2016, said Sunday he’s fit and ready for office.
“Why don’t you follow me around this week to New Hampshire, where we’re doing seven separate events, and understand that, thank God, I am blessed with very good health,” the independent Vermont senator, who will be 75 on Election Day, said Sunday on ABC’s “This Week.” “I don’t think I’ve taken a day off because of sickness in several years.”
“I believe, as somebody was when he was a kid a long-distance runner, I’m blessed with endurance, I’m blessed with health,” added Sanders, who, if successful, would become the oldest person ever elected president. “And we are going to do everything we can to A, win this campaign, and B, be as good a president as I possibly can be.”
http://www.politico.com/story/2015/06/sanders-declares-hes-fit-for-the-white-house-119510.html
and I got his mile PR from this interview he did last month:
HARWOOD: I read that you ran track in school. Was athletics important to you as a kid?
SANDERS: I came in third in my junior year in the New York City public school one mile. I think my best was 4:37, which is not superstar, but it's pretty good.