Thirty male PAH patients were included in the study. They were randomized into two equal groups; Training group (A) and Control group(B). Right ventricular systolic pressure (RVSP) measured using Doppler Echocardiography , Pittsburg sleep quality index (PSQI) questionnaire with the wrist worn actigraph used for the assessment of sleep disturbance, and Cardiopulmonary exercise testing (CPET) measurements included maximal heart rate and VO2max .All were measured before and after the study period for both groups.The training was a moderate intensity aerobic training on a bicycle ergometer (corresponding to 60% to 70% of the maximal heart rate they reach during peak oxygen uptake in the initial exercise test) for 30 to 45 min/day, 3 sessions/week for 12 weeks (36 sessions).
