On 30th Nov, 2002, we(Hart of Gold, NGO in Japan) held the Second athletic festival for youth in Siem Reap province. On aspect of the festival involved the investigation of the life and physical performance of the youth by means of questionnaire. We tried to determine the relation between athletic ability and an environment that encourages the exploration of an individual's athletic ability. These results are used as reference data when advancing further investigations.
 1) Sex difference is shown to be related to every factor regarding physical performance.
 2) Although flexibility and instantaneous power improved with the increase in age, quickness of movement is unrelated to an increase in age.
 3) Play or stretching usually improves an individual's spontaneous power and quickness of movement.
 4) Soccer was determined to raise physical performance all year 'round.
 Soccer, which is loved by the youth of Siem Reap, seems to contribute greatly to their physical performance. On the other hand, their playing games such as tag and riding a bicycle seem to exert different effects in respect to improvingtheir physical performance. Instaneous power, especially, is not improved though play. Judging from these observations, it is important that a systematic mode of instruction based on soccer is established. Moreover it is necessary to spread and promote not only soccer but to introduce other sports to the students in order to further increase their physical performance.