Seem to remember Wenger saying about Ramsey ahead of the Chelsea game that he is more or less fit now, but Ramsey doesn't trust his muscle to not break down when he feels a little something. So, they have decided to stop as soon as he feels anything at all in his muscle in training so far. He is himself aware of his problems in the past, of course, and so is the coaching staff. With the depth we now have, there is also room to be super cautious.
