Lizzo probably is relatively spry for a ham. Similar to, say, Chris Farley who could jump around and dance when he gave it some effort not to mention a "Fathlete" like Butterbean. What this indicates is these people are naturally fairly athletic however their eating is completely out of control. It's actually more of indictment of them personally because they are in a better position to get shape than, for example, Comfy who is not only out of control food-wise but indolent and obviously genetically cursed from top to bottom as well. Not to grant fat their "muh juhneticks" argument but it is a factor in this sense.