The tree house detectives are eager to win the Presidential Physical Fitness award, but one of the detectives is not quite up to the challenge. They decide that it is time for a little research to learn more about being fit. They visit NASA to learn more about muscles, bones and physical activity and why fitness is the key to space exploration.

Produced by NASA Langley Research Center's Office of Educational Programs. For additional information, visit their web site at http://scifiles.larc.nasa.gov

 

Captioned for the Hearing Impaired