TY  - GEN
AU  - Troiano,R P
AU  - Macera,C A
AU  - Ballard-Barbash,R
TI  - Be physically active each day. How can we know?
SN  - 0022-3166
PY  - 2001///0315
KW  - Adult
KW  - Age Factors
KW  - Child
KW  - Energy Metabolism
KW  - Exercise
KW  - Guidelines as Topic
KW  - standards
KW  - Health Promotion
KW  - Humans
KW  - Life Style
KW  - Nutrition Surveys
KW  - Physical Fitness
KW  - Program Evaluation
KW  - Risk Factors
KW  - Time Factors
KW  - United States
N1  - Publication Type: Journal Article
UR  - https://doi.org/10.1093/jn/131.2.451S
ER  -