Which statement about respiratory changes in older adults is incorrect?

The statement that the side-lying position is the best for breathing is accurate in certain contexts but can be misleading when generalized for all older adults. In many cases, the upright position is preferable for optimal respiratory function because it allows for better lung expansion and more effective gas exchange. The side-lying position can be beneficial in some situations, such as for individuals with specific medical conditions or those who are experiencing respiratory distress, but it does not universally enhance breathing for all older adults.

As for the other statements, they accurately reflect common respiratory changes in older adults. Airway resistance typically increases due to changes in lung structure, such as a decrease in elastic recoil. Breathing becoming shallower is also a prevalent phenomenon, often caused by the weakening of respiratory muscles and overall decreased lung capacity. Finally, the decrease in respiratory muscle strength is well-documented and contributes to these changes, impacting the efficiency of the respiratory system as individuals age. Therefore, the context of the question emphasizes the importance of the best positioning for aiding respiratory function.