@article{xu-methods2022,
  author    = {Zetao Zhu and Huining Li and Jian Xiao and Wenyao Xu and Ming-Chun Huang},
  title     = {A Fitness Training Optimization System Based On Heart Rate Prediction Under Different Activities},
  journal   = {Elsevier Methods},
  volume    = {205},
  pages     = {89--96},
  month     = jun,
  year      = {2022}
}