@misc{indiciae8451e47bfcbf,
  title = {Be physically active each day. How can we know?},
  author = {R P Troiano and C A Macera and R Ballard-Barbash},
  year = {2001},
  doi = {10.1093/jn/131.2.451s},
  url = {https://pubmed.ncbi.nlm.nih.gov/11160577/},
  note = {Source identifier: 11160577}
}