You don't honestly think he would post something on facebook like that if it was due to an injury do you? come on, he's obviously been working hard training and it was an off the cuff remark
Completely agree. No way would Andy announce a set-back in his recovery like that. This is the man who described his back as "a bit sore" a few days before the news of his surgery broke. Despite what some people like to think, he isn't prone to melodrama. He does like to make the odd joke.
My immediate thought was it meant he was training hard, which is a very good sign.