messi should ask ronaldo for some advice on this, because i can't remember the last time when he was injured.
I rate Messi over CR in almost all categories, but CR is trully amazing athlete...never heard of his diet he just look ready all the time.
I know many will jump on this, but the biggest problem would be if it turns out to be Messi's fault..meaning: he runed a lot more before, than he turned that down a bit which is normal, to play every game. But every time I look stats from UEFA statt he runs 2-3km less than everyone else.
Maybe he is not training as hard, and that, every athlete knows, will come back to hunt you, and of course he walks a lot and then suddenly bursts in to sprint which puts more strain on muscles.
Of course I'm just guessing but saddly I don't belive in red meat theory that much, after all if it was only that he would change his diet back, he is not stupid nor he wants to be injured.