The Effect of Superdrill Exercise on the Increase of VO2 Max of UKM (Students Activity Unit) Tenis Athlete of Yogyakarta State University In Proceedings of the 3rd Yogyakarta International Seminar on Health, Physical Education, and Sport Science in conjunction with the 2nd Conference on Interdisciplinary Approach in Sports YISHPESS and CoIS - Volume 1, 37-42, 2019 , Yogyakarta, Indonesia