Muscles hurt too much to move. Obito had food, and he was starving. Perfect logic.

"And whom is this mystery supplier, I might ask." Never really got it in him to ask, didn't seem like a big deal.

He tries to sit himself up proper, legs under him and everything, but the pain in his muscles and joints is too great, a short, frustrated groan leaving him before he just gives up again.

There would be gain out of this, stronger muscle, after all the soreness and healing, but for now it seemed not worth it.