Definition
Stress placed on the body by physical conditions or demands, such as fatigue, lack of sleep, missed meals, dehydration, illness, noise, vibration, extreme temperatures, or the effects of altitude. These factors degrade the body's ability to function normally and reduce a pilot's capacity to perform safely.
Plain English
Stress that comes from what your body is going through — being tired, hungry, dehydrated, sick, hot, cold, or worn out. It wears you down before you ever notice it affecting your flying.
Context Anchor
Used in aviation instruction and stress management when identifying physical stressors that may affect a lesson, flight, or cockpit decision.
Derivation
‘Physiological’ comes from the Greek physis (nature, the body) and logos (study of). It refers to how the body functions. So physiological stress is stress that acts on the body itself — as opposed to stress that acts on the mind.
Why Pilots Care
Unmanaged physiological stress can cause slower reaction times, poor decision-making, and increased risk of accidents.
Grounding Statement
A student who slept poorly and skipped breakfast may bring stress into the cockpit before the first maneuver begins.
Intuition Check
Physiological stress does not mean only worry, fear, or mental pressure. Here it means stress caused by the body’s physical state.
Example Sentence 1
After flying three legs without a proper meal or water break, the pilot recognized the symptoms of physiological stress and called it a day.
Example Sentence 2
Fatigue is a common source of physiological stress that affects pilots on long cross-country flights.