I thought the reason he was out of shape was because his knee was all fucked up from falling off that ledge when he killed Harvey Dent? Although then he put on a magic kneebrace and could suddenly kick his skinny atrophy-quadricepped leg through bricks no problem, so maybe he was actually OK... We're getting close to making a case that there has never been a logically plotted (live action) Batman movie, aren't we?