Fatigue is a human factor in aviation that can significantly impair mental and physical performance. Factors that can lead to fatigue are lack of sleep, emotional exhaustion, stress, long duty hours, time zone changes (jet lag). Fatigue can result in:

• Increased number of errors
• Tunnel vision (narrowed field of attention)
• Reduced situational awareness
• Decreased reaction time
• Poor decision making
• Reduced attention

While sports might cause temporary tiredness, regular sports actually improve cognitive performance, attention, and alertness over time.

Poor diet may affect health in the long term, but it does not directly cause tunnel vision or reduced attention.

Relaxation techniques improve attention, reduce stress, and can help prevent fatigue.