Performance analysis in racing disciplines, also known as race analysis, involves measuring split or lap times at specific positions or distances. Official times provide some data, but more detailed measurements must be taken for precise analysis. Filming with appropriately positioned cameras can detect athletes’ passage at specific positions. Therefore, many studies have used that method for detailed event timing and race analysis. Nevertheless, the absence of marks indicating certain positions poses challenges. Geometric calculations can compensate for missing marks, but the calculations entail intensive effort. In this study, we examined methods for calculating mark coordinates of 400 m oval athletics tracks. Thereafter, the calculated results for two tracks with typical layouts were presented. Furthermore, two application examples for identifying additional analysis-point positions were demonstrated. No marks exist for some analysis-point positions, but this method allows calculation of appropriate positions and supports detailed race analysis.

The percentage of women in Japanese society who continue to work after childbirth is gradually increasing. Consequently, an increasing number of female athletes want to continue competing after childbirth. It is difficult for women to continue competing after giving birth, which is the current issue in Japan. In this study, we interviewed 12 female athletes who continued to compete after childbirth and competed at the world's top level. We analyzed their attitudes and the support they received from their surroundings, and explored the factors that made it possible for them to continue competing. The results revealed that “flexible goal setting,” “freedom from gender roles,” “support from family members other than partners,” “role models,” and “existence of lower category competitions” were important for continuing to compete.