1:1 농구수비 상황에서 숙련성과 페인트 동작에 따른 지면반력 비대칭성, 압력중심 및 준비 시간에 미치는 영향

PURPOSE This study was conducted to investigate the differences in defensive response strategies according to player expertise, offensive direction, and the presence of deceptive actions in a one-on-one basketball context. Specifically, ground reaction force (GRF) distribution between both feet and center of pressure (COP) variability was examined during the initial defensive movement phase. METHODS Participants included seven skilled male university basketball players and seven novice male university students with <3 years of experience. They were required to respond to the visual stimulus of an offensive player performing either a shoot or a directional dribble (left or right) on a screen. Upon presentation of the visual stimulus, the participant performed a defensive movement from a designated position. A two-way mixed ANOVA as conducted on variables, including the difference in bilateral foot contact timing difference, preparatory time, GRF asymmetry, and COP variability, with expertise and offensive direction or faking condition as independent variables. RESULTS Experts exhibited a delayed but more differentiated bilateral foot contact pattern than novices, indicating a significant effect of expertise. They also demonstrated a higher GRF asymmetry. COP variability in the mediolateral (ML) direction revealed significant main effects of both expertise and offensive direction. In particular, experts showed greater COP ML variability during lateral drive situations than novices. They also adjusted their preparatory time according to the presence of a deceptive action. CONCLUSIONS Experts used a gradual and asymmetric foot contact strategy during initiation, characterized by higher GRF asymmetry and increased COP variability. Therefore, they may adopt a more flexible and anticipatory movement pattern, enabling stable posture adjustment and directional readiness in dynamic defensive scenarios.