The aim of the research is to reveal the results of the intervention with a physical activity and nutrition program adapted to autistic individuals with eating problems. Among the single-subject research models, the multiple probe model across behaviors with a single initial probe phase was used. The population of the research consists of adolescent individuals with mild autism and obesity problems. The sample of the research consists of one (1) person determined by simple random sampling method among the families who voluntarily agreed to participate in the research. The research lasted twenty-eight (28) weeks. The data obtained were recorded by weighing before starting the study, every week after the start of the study, and the week when the study ended. The data obtained at the end of the application was analyzed by showing it on a graph. The data obtained was converted into point scores and turned into a line graph to reveal the change that occurred. It was observed that there were significant changes in the weight of the individual participating in the research over the weeks. Considering the results obtained, it can be said that the exercise and diet programs implemented during the research were effective.