This is a great source of basic information from nutrition to conditioning to physiology:
http://www.brianmac.demon.co.uk/

Coaching science abstracts - type in the word or phrase you want information for and the available list of article abstract[s] will appear. Each abstract cites the authors and journal for further reference:
http://www-rohan.sdsu.edu/dept/coachsci/index.htm
 

sport science - peer reviewed site for sport research.  great selection on statistics and many other attributes to this site:
sportsci.org/index.html

Metalink for the scholarly study of sport:
http://www.ucalgary.ca/library/ssportsite/

This is a good site for race and sports.  Includes an interview with Jon Entine
http://afroamculture.about.com/cs/raceandsports/
 

This site has profiles of many well-known black athletes
http://afroamhistory.about.com/cs/athletessports/index.htm

Another site on the accomplishments of black athletes
http://www.liunet.edu/cwis/cwp/library/aaitsa.htm

article: Strange Bedfellows Within the African American Community
http://blackathlete.net/Lifestyle/index.shtml

site for gait analysis
http://www.footmaxx.com/clinicians/biomech.html

an anatomy site, visual images that demonstrate the action and exercise performed by muscle  selected
http://www.exrx.net/Lists/Directory.html