The aim of the present study was to investigate effect of core strength training (CST) on core endurance, dynamic balance and agility in adolescent badminton players. Twenty adolescent (age = 10.8 +/- 0.3 years; height = 140.6 +/- 4.4 cm, weight = 33.9 +/- 5.8 kg) badminton players were randomly divided into two groups as training group (TG) and control (CG) group. All subjects were evaluated with Star Excursion Balance Test (SEBT), Illinois Agility Test, and the core endurance tests. The TG completed CST twice a week, for 6 weeks. There were significant increases in (p < 0.05) directions of SEBT and core endurance tests (p < 0.05). However, no significant change was observed for agility (p > 0.05). The CST resulted in significant gains in directions of the SEBT and core endurances in adolescent badminton players, but not in agility. (C) 2015 Elsevier Ltd. All rights reserved.