@misc{indiciae0fcea3fdb8c2,
  title = {Physical performance as a function of age.},
  author = {P O Astrand},
  year = {1968},
  doi = {10.1001/jama.205.11.729},
  url = {https://pubmed.ncbi.nlm.nih.gov/5695280/},
  note = {Source identifier: 5695280}
}