Inclusion criteria:  Male patients suffering from inhalation injury. Participant age ranged from 20-35 years old. All patients had the same medical care. Participants have received a good explanation of the treatment and measurement device. Treatment was conducted one month after inhalation injury.  Exclusion criteria:  Patients were excluded from this study for any of the following cases such as  Instability of patient's medical condition. Presence of any diseases that could affect the study results. Participants having respiratory, cardiac, or neurological diseases that affect pulmonary functions.