Rachel tries to follow ergonomic principles at work to avoid RSI. Which posture or method will help Rachel to prevent RSI while using the keyboard? Rachel should use an adjustable chair. She should place the chair and keyboard in a way that her elbows bend at

To prevent Repetitive Strain Injury (RSI) while using a keyboard, Rachel should follow certain ergonomic principles:

1. Rachel should use an adjustable chair with good lower back support to maintain the natural curve of her spine.

2. She should adjust the height of the chair so that her feet rest flat on the floor or on a footrest.

3. The chair and keyboard should be positioned so that her elbows are close to her body and bent at an angle between 90 and 120 degrees. This relaxed position puts less strain on the tendons and nerves of the forearm and wrist.

4. Rachel's wrists should be in a neutral position while typing, not bent upwards, downwards, or to the side. A wrist rest can help maintain this position but should only be used during breaks and not while actively typing.

5. The keyboard should be at a height where her shoulders are relaxed, and her forearms are parallel to the floor or slightly declined.

By maintaining this ergonomic posture and using the keyboard correctly, Rachel can minimize the risk of developing RSI.

Extra: The term Repetitive Strain Injury (RSI) refers to a range of painful or uncomfortable conditions of the muscles, tendons, nerves, and other soft tissues. It is caused by repetitive movements and overuse, often during computer work. Ergonomic principles are designed to optimize human well-being and overall system performance in the workplace. These principles aim to design a work environment that suits the user's capabilities and limitations.

This goes beyond just the placement of the keyboard and chair. It also includes the arrangement of the desk, monitor, mouse, and other equipment, so that there is less strain on any part of the body. Factors such as lighting, noise levels, and the organization of the workspace also play a role in ergonomics.

Additionally, incorporating frequent short breaks and muscle-stretching exercises into the work routine can be beneficial. These breaks can help to reduce muscle fatigue and give the body time to recover, potentially preventing RSI or mitigating its effects if already present. It is also recommended to vary tasks when possible to avoid overuse of the same muscle groups.