He's from a very war-like race, after all. It's in the blood. You fight or you die, kind of thing, you know?
Sure, he hasn't been ripping shamblers and gigglers limb from limb but he hasn't exactly been just sitting around getting fat and lazy, either. Aside from the intensely physical bits of blacksmithing (because, you know that Rakiim makes him do the "heavy lifting"), I have it in mind that ol' fuzz-face has a "fitness routine" that keeps him in fighting shape. Much like Ara, he doesn't make a huge public display of it whilst in Meadowbrook... well, not just yet, anyway... Simon and his crew are about to change that, though... But he does go hunting, gets his exercise, and such. He'll be fine. 
P to the S - Posts for both Aftermath and KCandK in the works... the wife has just kept me very busy this past week and my writing hasn't exactly fit into her agenda.