That's what the episode itself said, after all. Maybe the maintenance done by the longarm tribe was more of a psychological thing, a placebo effect.
A jolly good episode, all in all, even if I can't help but feel any grand new techniques are totally wasted, that is, used unnecessarily, against these opponents who are much weaker than the tougher enemies they faced before the time jump. The Luffy vs Hody fight is no different, even if Hody gets up after every beating, to pop more pills. The only real danger is the ship falling and that's it.