Improving the Endurance of the Lower Body Muscles Strength with the Application of Chair Media to Athletes Long Distance Running Numbers of KONI in Depok City

This study aims to increase the endurance strength of lower body muscles with application seat media athletes who run long distance running numbers in Depok City KONI athletes. The research sample was 30 from Platda were members team for preparation 2022 Porprov preparation. method used quantitative type action research, data collected using planning techniques (plan), (action), observation (observe), reflection (reflect). then analyzed quantitatively. technique collecting by testing and measuring ability leg press test. analysis t test at a significance level 5%. results explain training methods athlete's muscle including: 1) standing sitting on chair additional weight outside such as dumbbells or plates, 2) bridging exercises lifting waist footstool against chair, 3) Performing sit stand one footstool. increased third cycle, means regular varied mentoring carried out coach maximum corrective feedback train achievement motivation.