I can only go on like a broken record about how important I find stability exercises. An awful lot of my leg problems seem to become less when lower abs, back and pelvis are all well supported.
How to get that help: I wouldn't dare advise, but I do a bunch of exercises in the pool 3 times a week, together with other dry land exercises. Best to get physio tailored to suit the individual, but if that really doesn't suit, ask again and I'll e-mail you what I do.
Did your Dad see the right sort of physio? Some have very low expectations for older people, and don't give them help appropriate to athletes. Important to see someone with a strong interest in running, who will commit to getting him back in his running vest, not just tottering to local post office.
I met one who said "your fine, call me again when you need a wheelchair".
Oh yes, and tell him I'm cheering for him. Marj
