Which of the following is NOT a reason to maintain a straight back while working?

Maintaining a straight back while working is essential for several reasons related to health and safety, particularly in fields like cosmetology where professionals may spend long hours on their feet. The correct choice indicates that extra pressure on the joints is not beneficial, which aligns with key ergonomic principles.

When a straight back is maintained, it helps to evenly distribute weight and reduces strain on the spine and surrounding muscles. This alignment is crucial for preventing lower back pain, as poor posture can lead to increased stress on spinal discs and surrounding tissues. By keeping the spine aligned, the risk of injury decreases.

Improving posture contributes not only to a more professional appearance but also enhances overall comfort and efficiency while working. Good posture supports better breathing and circulation, which can lead to improved energy levels.

In contrast, the idea that "extra pressure on the joints can be beneficial" contradicts established ergonomic practices. Excessive pressure can lead to joint pain or injury, rather than providing any form of advantage. Therefore, the focus should be on maintaining a natural and aligned posture to promote long-term health and prevent discomfort during work.