If Anyone Ever Wonders Why Zoro Survived Thriller Bark Or Literally Anything Else Show Them This - Tumblr Posts

The Whole Cake Island Rescue Team went only a few days without food and they were already devoid of energy and Luffy was so emaciated he looked like an old man. Zoro, at the moment we met him, had already spent three weeks without food tied to a post under the direct sun, barely seemed to be feeling it, and gained enough energy from a single muddy riceball to double-team a Marine platoon with Luffy and take down Morgan. 

I thought this was just One Piece Anime Logic, but man, Zoro really is just Built Different, huh?