The aim of this research is to find out how much influence Fartlek training has on increasing VO2max in the futsal team of As-sofa Pekanbaru Islamic High School. This research was conducted near the As-Shofa Pekanbaru Islamic High School location, Jalan As-Shofa Labuh Baru Barat, Payung Sekaki Labuh Baru District. Payung Sekaki Pekanbaru City Raiu/ The research will be conducted from July to De…