Respiratory training improves morphological changes of the multifidus muscle in patients with chronic nonspecific lower back pain assessed by musculoskeletal ultrasound

Li Chao, Zhang Peipei, Xu Mengting, Li Linlin, Ding Jiangtao, Liu Xihua, Bi Hongyan

Chinese Journal of Tissue Engineering Research . 2023, (9): 1417 -1421 . DOI: 10.12307/2023.206