Endure

Endurance is a psychobiological phenomenon where your subjective perception of effort ultimately dictates your decision to slow down or stop.

The brain preemptively restricts muscle recruitment to hold energy in reserve, a protective measure that creates the illusion of absolute physical failure long before your body actually breaks down.

Environmental constraints like heat and oxygen deprivation function as cognitive dimmer switches that the brain uses to moderate your pace, rather than acting as hard biological stops.