Physically, while I'm a rather active person and I haven't yet met anyone who can run faster than I can (that's not to say I go around racing people - I'm sure I'd find someone faster if I did), my stamina is shit, so if our battle/race doesn't end within the first few minute, you'll probably win.
Mentally, although I guess it is also somewhat physical, if I've eaten within the last 2 days I can't eat anything that I don't like, and that is a damn large list - tomatoes, anything dairy-based, including cheese; peppers etc. And it's not like I'm allergic to any of it, I just can't stand the taste. I'll gladly drink milk-based hot chocolate, I'll eat pizza because both the tomato paste and cheese they use tastes differently and is masked by the flavour of bread and meat. But unless not doing so will harm me greatly, I'll never eat a tomato and down it with a glass of milk.