We employed Cochrane risk of bias (RoB) to evaluate study high-quality and synthesised facts narratively. From 8912 hits, we integrated 13 scientific studies: 11 ended up at high RoB; two at average RoB. PR improved useful exercise ability in 10 experiments, HRQoL in twelve, and breathlessness in 9 experiments. https://directivepublications.org/journal-of-respiratory-medicine-and-research/