This study aimed to clarify the relationships between athletic performance and trunk control on the sudden unanticipated load in adolescent football players. Eighteen adolescent football players performed trunk-control tests, namely, front- and back-bridge tests, and field tests, namely, sprint, arrowhead agility, countermovement jump, and standing five-step jump tests. For the trunk-control tests, the angular velocity of the trunk was measured using an inertial sensor. The relationships between the field test and each parameter of the trunk-control tests were analyzed using the Pearson correlation coefficients. Sprint time was significantly and positively correlated with the angular velocity of the x-axis in the front-bridge (r = 0.743-0.701, p < 0.01) and back-bridge (r = 0.612-0.491, p < 0.05) tests. The arrowhead agility test was correlated with the angular velocity of the x-axis (r = 0.543, p = 0.020) and y-axis (r = –0.533, p = 0.023) in the front-bridge test, and that of the x-axis (r = 0.546, p = 0.019) in the back-bridge test. Since the x- and y-axes of the angular velocity indicate trunk rotation in both tests and trunk extension in front-bridge test, respectively, these findings indicated that the control of trunk rotation and extension is important for the optimal sprinting and change-of-direction performance.