From the Center for Disease Control and Prevention comes a very extensive list of physical activities, from the common (baseball) to the less common (ballet). Each link brings up a very thorough discussion of the activity, its physical benefits, issues of concern, fascinating trivia (male cheerleaders), and sub-links. Physical Education and/or Hygiene teachers will definitely want to make use of this excellent resource.
Centers for Disease Control and Prevention
• Pictures and/or Illustrations
• Middle School Elementary School