What is the primary risk for residents who are less active and must stay in bed?

The primary risk for residents who are less active and must stay in bed involves the deterioration of muscle strength. Prolonged periods of inactivity can lead to muscle atrophy, which is a reduction in muscle mass and strength. This occurs because muscles need regular use to maintain their strength and size. When residents are confined to bed, the lack of movement and exercise results in weakening of muscle fibers, making it more difficult for them to regain strength and mobility once they are able to move again.

In addition to muscle deterioration, inactivity can lead to a number of other complications, such as pressure ulcers, blood clots, and decreased cardiovascular fitness. However, the specific focus on muscle strength underlines the most immediate concern for individuals who are bedridden.

The other options do not reflect the realities faced by less active residents in a healthcare setting. Increased appetite and improved social interaction do not typically correlate with inactivity; rather, they may worsen due to the lack of mobility and social stimulation. Enhanced mobility is not possible when someone is less active and confined to bed, making it an unrealistic choice in this context.