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Results 1 - 1 of 1 for Additive model
  1. Physical Activity Guidelines for Americans: 2nd edition (Department of Health and Human Services) - PDF  
    Exercise and Physical Fitness/Start Here ... Exercise and Physical Fitness ... Exercise for Children/Start Here ... Exercise for Children ... How Much Exercise Do I Need?/ ...
    https://health.gov/.../Physical_Activity_Guidelines_2nd_edition.pdf - External Health Links