@article{liu_2022,  title={METHODS OF CORE STRENGTH TRAINING IN COLLEGE TENNIS PLAYERS},  volume={28},  ISSN={1517-8692},  url={https://doi.org/10.1590/1517-8692202228062022_0103},  DOI={10.1590/1517-8692202228062022_0103},  number={6},  journal={Revista Brasileira de Medicina do Esporte},  publisher={Sociedade Brasileira de Medicina do Exercício e do Esporte},  author={Liu, Xiao},  year={2022},  month={Nov},  pages={771–774} }