The funny thing is, do they even really think anyone believes them? Do they actually think we're gonna just assume they're that athletic already? Thin people (especially those with muscle) inherently know what's entailed in working your way up to high levels of performance. It's not like they've never gone on a run before and don't know how difficult it is. This whale cosplayer is so oblivious to what it means to live a healthy lifestyle, that it just assume that other people are equally stupid. Like jogging is only something athletes in the Olympics do, and that no normal person knows what it entails to run 5 miles. So it just lies and assumes that, because obviously normal people don't jog, you'll just believe it because it sounds "reasonable enough". The sad part is, it probably believes it's that easy. It's probably just planning on running said distance at some point in the future. And if it ever does— which is highly doubtful: it'll get one block down the road, quit, barrel-roll back home and tell you at work the next day that it's now up to "10 miles a run". *facepalm*