Human physical and psychological limitations can alter throughout working life, and refer to, for example:

• Poorer eyesight and / or hearing.
• Reduction in memory capacity.
• Reduced strength.
• Increased fatigue.

These factors should be monitored to ensure staff remains fit for work.

This article will act as an entry point for several sub-articles:

• Level of Arousal
• Substance Abuse
• Fatigue
• Health Related Conditions
• Comfort
• Ageing Effects
• Physical Limitations