Yeah, I'm not impressed by the straightforward "it's all in your head, suck it up and walk it off" approach, but as Dr Hall says in the review, there's probably a grain of truth in it, in that the person who's got a self-image of being a chronic pain sufferer, a thing separate from the pain, is going to find it harder to recover than someone who doesn't. I can see that in miniature when I injure myself badly, like when I broke my toe or pulled my back ligament. Once they were past the chronic part (the back taking a year), as they healed, I tended to overcompensate for it because I "knew" that moving in such-and-such a way would cause me significant pain, even though that wasn't the case anymore. So I can see where that sort of thing might be applicable: sort of a need to rewrite interior scripts that had been written when things were physically a problem, but were still running when the underlying problem had changed or cleared up.

And having read about the problems Japanese baseball players had in the 1980s (I haven't read anything more recent about it, so I have no idea if this still occurs), I know the suck-it-up and work-through-the-pain attitude is a serious problem if there's something physically wrong: IIRC, several pitchers screwed themselves up permanently because the cultural ethos on those teams was, when something started hurting, to work it harder so they'd, say, strain their shoulder from pitching, then spend hours continuing to work it in order to work through the pain, and cause more and more damage.

(However, I don't have medical training and would not presume to diagnose anyone's pain or treatment thereof!)