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Course-Correct for Stress A group of French researchers from the University of Nantes wanted to see how stress affected individuals’ judgment of what they were capable of. They chose a simple task: estimating how high of a bar one could step over. The trick was that participants had to make their guess after being kept awake in a lab for twenty-four hours straight. Sleep deprivation does a number on the brain, inducing stress and fatigue. Regardless of the actual height they could navigate in a normal state, participants severely underestimated the height they could step over when in a sleep-deprived state. Stress alters our judgment of what we’re capable of. In another study, researchers found that those in chronic pain tend to overestimate the distance to walk to a target. These findings led sports psychologist Thibault Deschamps to state, “Individuals perceive the environment in terms of the costs of acting within it.” In another study, researchers asked individuals standing at the bottom of a hill to guess how steep the hill was. The overwhelming majority greatly overestimated the steepness, guessing it was a 20-, 25-, or even 30-degree-grade hill. In reality, the hill had a 5-percent grade. There was one group of students who were accurate: the cross-country team. If we have the capability to run up the hill without too much undue stress, we see the steepness for what it is. If we don’t, it looks overwhelming. In an interesting twist, when researchers took those runners and made them go out for a long run and then come back and judge the slant of the hill, their hill-judging expertise disappeared. In a state of fatigue, they started overestimating the slope to a much greater degree. Fatigue had shifted their capabilities and, with them, their perception abilities. When we flip into a threat state, a freeze reaction, or a full-blown freak-out, the normal often seems unattainable. We tend to overcompensate, greatly diminishing what we’re capable of. Part of having an accurate appraisal is course-correcting. If you feel tired, fatigued, or anxious, you can learn how to navigate that. But knowing that you might sell yourself short gives you the power to do something about it, and to readjust as stress or fatigue mounts.
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Steve Magness (Do Hard Things: Why We Get Resilience Wrong and the Surprising Science of Real Toughness)