8-week, 3-day/week supervised training will be applied to the participants in this group. After the initial assessment, patients in this group will receive a one-session education on the pathophysiology of PAH, the benefits of physical activity, and energy conservation techniques during activities of daily living. Pharmacological treatment of patients in this group will be continued.

Any intervention will not be performed. After the initial assessment, patients in this group will receive a one-session education on the pathophysiology of PAH, the benefits of physical activity, and energy conservation techniques during activities of daily living. Pharmacological treatment of patients in this group will be continued.

The exercise training plan for this group consists of 4 stages. Each stage lasts 2 weeks and consist of 5 kettlebell (KB) exercises. These exercises will continue from basic (single movement training) to advanced (comprehensive movement training) and is geared towards functional training. Participants will perform 2 sets of 12 repetitions of each exercise. Each training session is planned to last 45 minutes.

The following exercises will be used in KB training: biceps curl, triceps extension, kettlebell swing (two-handed), kettlebell dead lift, kettlebell goblet squat, suitcase carry, waiter carry, bottoms up carry, farmer's walk, overhead carry, lunge, kettlebell row.

Cardiopulmonary data will be evaluated with mobile cardiopulmonary exercise test during daily activities. Participants will perform the following activities with mobile cardiopulmonary exercise test (CPET): putting on socks on both feet (sitting on a chair), putting on both shoes (sitting on a chair), putting on a coat (while standing), lifting material (placing 6 jars -each 400 gram- at chest-level height), sweeping the floor for 4 minutes, washing dishes for 4 minutes, go up and down stairs - 1 floor. There will be a 5 minute rest between all activities.

The 6-minute walk test will be performed.

Isometric muscle strength will be measured with a handheld dynamometer for elbow flexion, knee extension, knee flexion, shoulder flexion, shoulder abduction, hip flexion and m.serratus anterior.

Hand grip strength will be measured with a digital hand dynamometer.

This outcome will be assessed with the Duke Activity Status Index. As a result of scoring, a total score ranging from 0 to 58.2 is obtained. Higher scores indicate higher functional capacity.