Influence of Cardiopulmonary Rehabilitation on Cardiorespiratory Adaptation in Patients With Pulmonary Hypertension

Inclusion Criteria: \- a)Medically stable pulmonary hypertension patients who were under optimized medical therapy. b)Pulmonary artery pressure ≥ 25 mmHg confirmed by RT side heart catheterization. c)Forty two male patients with group 3 pulmonary hypertension (Chest cause) include Obstructive lung disease ( COPD and sleep apnea ) and restrictive lung disease (ILD). d)The patients' ages will range from 45 to 65 years old. e)BMI (25 - 34.9) kg/m2. f)World Health Organization (WHO) classification of functional classes II to III ( class II are patients with pulmonary hypertension who have a mild limitation of physical activity )(class III are patients with pulmonary hypertension who have a marked limitation of physical activity Exclusion Criteria: * g)Uncontrolled systemic HTN. h)Other types of pulmonary hypertension.. i)Smoker j)Any condition of kidney failure. k)Neurological or musculoskeletal conditions that interfere with gait l)Impaired vision and/or hearing. m)Patients who are unable to follow verbal instructions. n)acute exacerbation condition. o)unstable angina, serious cardiac dysrhythmias on resting ECG.