@misc{indiciae85b8f1d5cc1d,
  title = {Beta-endorphin and sprint training.},
  author = {J M Metzger and E A Stein},
  year = {1984},
  doi = {10.1016/0024-3205(84)90608-8},
  url = {https://pubmed.ncbi.nlm.nih.gov/6325839/},
  note = {Source identifier: 6325839}
}