TY  - RPRT
TI  - Be physically active each day. How can we know?
AU  - R P Troiano
AU  - C A Macera
AU  - R Ballard-Barbash
PY  - 2001
DO  - 10.1093/jn/131.2.451s
UR  - https://pubmed.ncbi.nlm.nih.gov/11160577/
ID  - 11160577
ER  -