We used Cochrane threat of bias (RoB) to assess research high quality and synthesised knowledge narratively. From 8912 hits, we bundled 13 scientific studies: 11 have been at substantial RoB; 2 at moderate RoB. PR improved functional physical exercise capacity in 10 research, HRQoL in 12, and breathlessness in https://directivepublications.org/journal-of-respiratory-medicine-and-research/