Pulmonary arterial hypertension (PAH) is a group of disorders defined by a progressive elevation of pulmonary vascular resistance in the small pulmonary arteries and arterioles. The objective of this short communication was to assimilate the evidence for exercises in pulmonary arterial hypertension through an informed overview of published reviews in PubMed. Evidence evolved from studies on exercise-induced pulmonary hypertension to exercise testing in PAH and more recently, exercise training and its proposed beneficial effects in people with PAH. There is need for more studies in this area, and the limited evidence is too insufficient to draw conclusive effects.