A Mobile Health Intervention to Increase Physical Activity in Pulmonary Arterial Hypertension.

Background: Supervised exercise training improves outcomes in patients with pulmonary arterial hypertension (PAH). The effect of an unsupervised activity intervention has not been tested.

Research Question: Can a text-based mobile health intervention increase step counts in patients with PAH?

Study Design And Methods: We performed a randomized, parallel arm, single-blind clinical trial.