Anxiety includes worries that have unclear origins or worries that won’t go away when the trigger is gone. The stress curve graphic in the previous section demonstrates how stress impacts performance ...

But no matter your stress tolerance, even small interventions—like getting sufficient sleep and exercise—can help prevent you ...

Note that the force and the displacement have been scaled respectively to stress (by dividing by the original cross-sectional area of the specimen) and to strain (by dividing by the original length).