@article{silva_ferraz_ferretti_sfredo_2017,  title={Posterior chain flexibility and lower back pain in farm workers},  volume={30},  ISSN={0103-5150},  url={https://doi.org/10.1590/1980-5918.030.002.AO02},  DOI={10.1590/1980-5918.030.002.AO02},  number={2},  journal={Fisioterapia em Movimento},  publisher={Pontifícia Universidade Católica do Paraná},  author={Silva, Marcia Regina da and Ferraz, Lucimare and Ferretti, Fátima and Sfredo, Cristiane},  year={2017},  month={Apr},  pages={219–226} }