My dad just turned 66 and wants to get back in shape. Problem is he wants to do it by jogging, even though he has not exercised for several years now, and back when he did he was constantly injuring his achilles heel while he did it. I think he'd be much less likely to hurt himself if he got into cycling because it's a low-impact sport (I also happen to love biking and would like to share that passion with him).
Does anybody have any links to good articles on the negative effects of cycling versus running for the 50+ age group? I'd like to convince him once and for all that he'd be better off on two wheels.
PS. He's a retired organic chemist, so he always demands scientific proof for everything