This book contains the proceedings of the Unimed International Conference on Sport Science (UnICoSS), which took place in Medan, Indonesia 28 November 2019. UnICoSS is co-organized by Faculty of Sport Sciences, State University of Medan with theme “Sport Science In Disruptive Era : Challenges And Opportunities”. In Industrial Revolution (RI) 4.0 era, sports workers are required to encounter of challenges that arise in the current era. The Conference Technical Program includes oral presentations and poster presentations, organized in eight simultaneous tracks: Sport coaching, Biomechanics, Sport medicine, e-sport, sport management, physical education, health and recreations, sport disabilities and sport innovation. All received full papers as well as all short papers are reviewed by blind reviewer and accepted papers are included in this book of proceedings. UnICoSS received 70 submissions from all continents some of which are presented orally in parallel sessions, and others are presented through posters. To evaluate each submission, a blinded review was performed by the Program Committee, whose members are highly qualified researchers in UnICoSS topic areas. All papers presented at this conference will be available at the Atlantis Press Library (https://www.atlantis-press.com/). We would like to express our thanks to all participants. First of all, to the authors whose quality work is the essence of this conference. Secondly, to all members of the Program Committee and Auxiliary Reviewers who helped us with their expertise. We would also like to thank the invited speakers for accepting our invitation to share their expert knowledge and vision. Finally, a word of appreciation for the hard work of the secretariat: organizing a conference of this level is a task that can only be achieved by the collaborative effort of a dedicated and highly capable team. We wish you all an inspiring conference and an unforgettable stay in the lovely region of Medan, Indonesia. We hope to meet you again next year for UnICoSS 2020.