There’s a reason a strenuous outing makes you desire a greasy mound of meat: it has a lot of what your body needs. This we learned from talking to six Outside writers and editors about their greatest aprés-adventure burgers, and by unpacking their stories with the help of two registered dietitians. As it turns out, most of us are underfed when we head into the wild, and the result is a deep hunger for carbs, protein, and fat. Which means that, physiological speaking, a burger delivers.