Although the progressive nature of pulmonary hypertension (PH), including the impairment of respiratory muscle function, studies have demonstrated beneficial effects of physical exercise on the functional limitations caused by the disease in this population, being an important collaborator to the conventional drug therapy.Respiratory muscle training (RMT) improves functional capacity and quality of life (QoL) in patients.A randomized controlled trial was conducted to evaluate the effectiveness of this protocol on respiratory muscle strength and endurance, functional capacity. 18 subjects were allocated in 2 groups, group A was control group and group B was experimental group. Group A or Control group received deep breathing exercises. Group B received 30 minutes of IMT 6days weekly for 2 weeks by using a pressure threshold device. The purpose of this study was to investigate the effects of inspiratory muscle training (IMT) in PAH. To evaluate effectiveness of IMT mouth pressure device ,functional capacity using 6 minute walking test (6MWT)health assessment via SF 36 questionnaire were used before and after training protocol.

Inclusion Criteria:

Age group of 40 to 70 years.

• Both male and females will be included.
• Patients with a diagnosis of PH (PAPm ≥ 25mmHg and PAOP <15mmHg);
• Clinically stable with augmented and unchanged daily medication therapy in the last three months; Subjects who agree to contribute in the research by signing a free and knowledgeable consent form.

Exclusion Criteria:

• COPD
• Severe ischemic heart disease
• Left heart failure;
• Cor pulmonale
• Cognitive disorders;
• Orthopedic problems; e.g;fracture in thoracic region.
• Emergency or elective surgical intervention during the protocol;
• Recent viral infections;