At Least Five a Week, published in 2004 by the Department of Health, Physical Activity, Health Improvement and Prevention, presents evidence of the relationship between physical activity and health. It is geared toward policy makers and program administrators.
For the recommendations, go to http://www.dh.gov.uk/prod_consum_dh/groups/dh_digitalassets/@dh/@en/documents/digitalasset/dh_4080981.pdf