What is a common reason for elderly individuals to be at higher risk for injury?

Elderly individuals often experience various physiological changes as they age, which can contribute to an increased risk of injury. One significant factor is the instability of knee joints. Aging can lead to the degeneration of cartilage, decreased flexibility, and weakened muscles around the knees, making individuals more susceptible to falls and injuries. This instability can affect balance and coordination, further increasing the likelihood of accidents or injuries during daily activities.

In contrast, the other options do not correlate with higher injury risk in the elderly. Increased physical activity generally has a protective effect, enhancing strength and balance, while an enhanced sense of smell and improved cognitive function typically contribute to better awareness and decision-making, reducing the likelihood of circumstances that lead to injury. Focusing on joint instability highlights the physical vulnerabilities that older adults face, emphasizing the need for preventive measures to ensure safety and stability.