Useful Links
http://familydoctor.org/059.xml
http://www.kidshealth.org/kid/stay_healthy/fit/work_it_out.html
http://www.diabetes.org/weightloss-and-exercise/exercise/what-is-exercise.jsp
http://www.nifc.gov/FireFit/fitness.htm
http://www.cdc.gov/nccdphp/dnpa/physical/components/index.htm
http://www.hoptechno.com/book11.htm
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