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# Instrument Description ## 4.4 Instrument Types - **Physical fatigue:** continuous effort - **Mental fatigue:** tasks demanding high attention (sleep disruption, eye strain, headaches, digestive issues) - **Premature aging:** physical and mental strain related health problems, for example, hea...

# Instrument Description ## 4.4 Instrument Types - **Physical fatigue:** continuous effort - **Mental fatigue:** tasks demanding high attention (sleep disruption, eye strain, headaches, digestive issues) - **Premature aging:** physical and mental strain related health problems, for example, health problems of a person older than 60, and health problems of a person whose current age is 38. ## PREVENTION AND PROTECTION MEASURES **Prevention:** The goal is to eliminate or reduce risk. The objective is to avoid creating more risk. **Protection:** The goal is to eliminate or reduce risk. The objective is to minimize harm to the worker. **Preventing Risks to Workers:** The goal is to address the risk's original cause and or the risk source/origin in order to avoid further danger. * **Substitution:** Replacing machines or substances that pose a risk with safer options. * **Equipment maintenance:** Maintenance of equipment and installations to prevent risks. * **Design Considerations:** Considering important factors in the design, arrangement, and organization of work equipment to prevent risks. **Collective Protection**: Protection methods applied to a group of workers. * **Examples:** barriers to prevent falls, nets to secure objects. **Individual protection**: Protection methods applied to an individual worker. * **Example:** special gear.