The all-action defender was absent for the first trio of games because of a calf problem picked up in pre-season.
Collins told Villa's website: "It was my calves.
"I've struggled with them for a while. I've found out that it was because of my boots so I've changed them. When I was at West Ham I wore a certain type of boot and then last year I wore a different type and then went back to the ones that I had a problem with without really associating it with the problems.
"So I've gone back to my old ones again now and it seems fine. I don't know what it is, because you don't even think about it. The physio just mentioned 'What sort of boot is it? I'm obviously wearing the same make, but just a different style of boot.
"I've changed back and touch wood everything's been fine."