Which of the following is a risk factor for pressure ulcers?

Immobility is a significant risk factor for pressure ulcers because it prevents adequate blood flow and pressure relief to the skin and underlying tissues. When a person is unable to change positions or move, it increases the duration and intensity of pressure on specific areas of the body, usually over bony prominences. This sustained pressure can impair blood circulation, leading to ischemia, tissue damage, and eventually, the development of pressure ulcers.

In contrast, high physical activity, good nutrition, and effective hydration are protective factors that contribute positively to skin health and overall well-being. High physical activity promotes circulation, good nutrition supports skin integrity through essential nutrients, and effective hydration helps maintain skin elasticity and resilience. Hence, while immobility poses a significant risk, the other factors are conducive to preventing pressure ulcers.