Sympathies on the plantar fasciitis. I have that, too, but it fortunately hasn't bothered me in the past year.

I find walking doesn't affect my blood sugar enough. Fortunately, calimac and I had bought an exercise bike ages ago when we first moved in together. So we've had this thing sitting in our living room ready to use at any time. (To be honest, it has collected a lot of dust over the years, but now it's used regularly.) I find it is better for me with lowering my blood sugar. (I realize this kind of thing differs from person to person.) I'm glad we bought it and kept it even though there were some years when neither of us used it.