Abstract：The ecological perspective emphasizes the indivisibility of individual and environment, as action takes place in the individual-environment system. Although athletic training is specific to motor performance, the effect of specific sport training on motion sickness is not thoroughly investigated. By manipulating moving-room movement and stance pattern, this study aimed to explore the influence of specific sport training on motion sickness susceptibility and postural control, in light of kinematic interactions between individuals and environment. Sixty-two athletes with different specific sport training and thirty age-matched non-athletes were recruited for this study. Magnetic tracking system was used to register the movements of participants and the moving-room at a sample rate of 120 Hz. The effects of the experimental manipulation on kinematic variables were examined with two-way mixed design analysis of variance (ANOVA). The results showed that sway baseline was not different for any specific sport training, except archery. Athletes in archery exhibited a smaller postural sway than the non-athletes. Although all athletes were not clearly susceptible to motion sickness, they could utilize a greater postural sway to couple room movement during the instability task. In conclusion, specific sport training potentially affects the posture control, in agreement with the indivisibility of individual and environment from the ecological standpoint. (Full text)