Winnie Lim

Paulus and his colleagues have found that crucial differences show up in the activation of the insular cortex, a region of the brain that monitors sensory signals from within the body. In a series of studies starting in 2012, the researchers put hardened marines, elite adventure racers, and ordinary people through the fMRI tests. Some members of the control groups panicked and had to be removed from the scanner, but the elite performers handled the scenario with ease. In fact, while the control groups got worse at the cognitive task when their breathing was restricted, the elite groups actually got better—precisely the sort of performance under stress that enables you to dig a little deeper when the stakes are highest, whether in the heat of combat or at the end of a multi-day adventure race.