How does Lukaku being fat and out of shape not affect how hard he can work on the pitch?What kind of list is that? Lingard runs his ass off. There are countless examples of Lukaku busting a gut to get back. Mata never stops running. Lukaku being out of shape and Mata being slow doesn't change the fact they often work very hard on the pitch.
It's exactly because his fitness is so disgraceful that he can only manage about 30 minutes of hard work and then after that he's blowing out his arse.