The purpose of this study was to describe the processes of the 5th graders` perception changes in a multidisciplinary team approach to health-related fitness program. Thirty-four 5th graders (18 boys, 16 girls) of Seaside Elementary School in Siheung City participated in the health-related fitness program for 22 sessions from May of 2007 through September of 2007. Observations of the lessons, questionnaires, interviews, and teacher diaries were used to collect the qualitative data. Constant comparative method and inductive analysis were used to analyze the data. First, the participants, while participating in the fun and exciting multidisciplinary team approach to health-related fitness program, had begun to have positive perceptions regarding health-related fitness. Second, the processes of the changes in perceptions were due to “fun and fit”, “success oriented”, “improved fitness”, “increased self confidence”, and “help from team members”. Third, many participants were changed in their attitude regarding healthy lifestyle and tried hard to stay fit, active, and healthy.