@article{sang-kyun park2022plank,
  title={Elbow plank exercise improves immunocyte function and physical fitness in an elderly male: a case study},
  author={ki-soo lee,seung-jae heo,gwang-seok hyun,sang-kyun park,jun-youl cha,yong-seok jee},
  journal={Journal of Men's Health},
  volume={18},
  number={4},
  pages={1--8},
  doi = {10.31083/jomh.2021.134},
  year={2022}
}