[ABSTRACT] In this study, we examined how the influence of coaching by other people on the perception of the surrounding situation changes in the context of physical exercise with the exercise intensity, which may lower one’s attention. With 36 participants having exercise experiences of more than 6 years, we set four groups based on the presence or absence of exercise and coaching: a control group without exercise and coaching from others, an alert group that does not exercise but receives coaching from others, an exercise group without coaching from others but do exercise, and a coaching group with exercise and coaching from others. The experimental task was to watch the video on inattentional blindness and answer the video content and the change in the situation that occurred in the video. The alert group and the coaching group were asked coaching just before the situation changed. Through the results, it was inferred that coaching by other people widened the range of attention and raised awareness of changes occurring in the circumstances. Based on these results, coaching in sports thus has a perceptual effect of promoting awareness of change in the circumstances and widening the range of attention, and it is considered to be one of the important features for in supporting performance.