Which muscle group is primarily engaged when performing postural drainage?

Performing postural drainage primarily engages the respiratory muscles. This technique is used in physical therapy to help clear mucus from the lungs, which involves positioning the body to allow gravity to assist in the drainage process. The respiratory muscles, including the diaphragm and intercostal muscles, play a critical role in expanding the lungs and facilitating effective breathing, making them essential during this procedure.

By using gravity and breathing techniques, the respiratory muscles are activated to move air in and out of the lungs more effectively, thereby aiding in mucus clearance. While the abdominal, leg, and back muscles may be involved in various aspects of positioning or the effort of the process, they are not the primary focus or the muscles intended to be engaged during postural drainage. The primary goal is to enhance lung function and promote respiratory health, and this is best accomplished through the engagement of the respiratory muscle group.