"Lewis is a very good player but he is not fit enough yet, he carries too much weight," Davies told the Evening Post.
"We know we can't work on him now as we could in the summer.
"But, in the summer, he can be expecting to train at 7am, 10am, 2pm and 5pm, because that is what will be required to get him to the level of fitness we want."
Davies added: "That is not a threat. It is not just him - it applies to the other players too."