The training of the experimental group was conducted three times per week for four weeks, and it consisted of 30 minutes of PNF breathing exercises a session. When performing the PNF breathing exercises were performed, the subjects were in a supine position. A therapist placed his open hands on the lateral surfaces on both sides of the 8, 9, 10, and 11th ribs of the subject. The therapist instructed the subjects by saying, “Take a deep breath”. As the subjects’ ribs moved upward and laterally, the therapist assisted the movement of the subjects’ ribs to promote the subjects’ respiration pattern. At the subjects’ maximum inspiration, the therapist said, “Hold your breath for five seconds” while dorsomedially applying soft manual resistance to the lower rib regions on both sides. When the subjects’ breathed out, the therapist said, “breathe out Maximally”. At this time, the subjects’ ribs moved downward and medially. At maximum expiration, the therapist pushed the lower rib regions on both sides upward while gathering the regions dorsomedially, and the therapist shook the region to assist with the discharge of the air remaining in the lungs14, 15).