Five⁃repetition sit⁃to⁃stand test in lumbar degenerative diseases：A study on reproducibility and consistency 

CHEN Xi, WANG Lei, FENG Chengcheng.
The Journal of Practical Medicine . 2021, (13): 1723 -1726 .  DOI: 10.3969/j.issn.1006⁃5725.2021.13.016