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Objective: In recent years, increases in sexually transmitted infections, cervical cancer caused by HPV, and abortions due to unwanted pregnancy among those in their 20s have become serious issues that threaten fertility. This study aims to identify issues in need of attention and the difficulties experienced by school nurses in teaching sex education in high schools preemptively before these students become sexually active in order to promote responsible sexual behaviors for the prevention of STIs. Method: ICHUSHI Web Ver. 5 and CiNii were queried for literature published between 2000 and May 2022. Search terms were "yōgokyōyu" [school nurses], "seikyōiku" [sex education], "seikansenshō" [sexually transmitted infections/diseases], and "kōkōsei" [high school students]. In addition, we limited the search to Japanese literature only, due to differences in cultural background and the roles of school nurses. Results & Observations: Sex education is taught by multiple faculty members and implemented into multiple subjects such as health & physical education and home economics. There are differences in the content taught by school nurses and other faculty. As specialists in health and hygienics, school nurses demonstrate high awareness and positive attitudes toward sex education. Additionally, while they play a central role in sex education, they face difficulties due to having no position in school health plans, differences in awareness among faculty, busy schedules, difficulty securing time, and failure to coordinate with other faculty. It is necessary to consider school-wide policies that systematize sex education as a continuous subject. Furthermore, while they have many opportunities to undertake consulting duties on sexuality, there is uncertainty among school nurses on their ability How to cite this paper: Nakamura, T.,

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Aim: To assess the safety and effectiveness of a chair-type training machine developed for the elderly and to conduct a training program in healthy women using this machine. Methods: Twenty-four healthy women (mean age: 27.0 Ϯ 5.4 years; range: 21-38 years) were randomly assigned to the exercise program (intervention) group (n = 12) or the control group (n = 12). Intervention: Training program using the chair-type training machine for the elderly in 60-min sessions twice a week for 12 weeks. Measurements: Safety standards for machinery (ISO 12100) and physiological phenomena (blood pressure, heart rate, and subjective symptoms and objective symptoms) were assessed. The primary endpoints were isometric muscle strength (knee joint extension strength (KJES)), ankle dorsal flexion strength (ADFS), and ankle plantar flexion strength (APFS); these were assessed using standardized protocols at the beginning and the end of intervention. Results: There were two dropouts in the intervention group. The safety of the machine was judged as acceptable based on the standard. No training-related medical problems occurred. It was observed that 12 weeks after the end of the training program, the isometric muscle strengths of all the left muscles and the right APFS were reinforced in the intervention group (P < 0.05). The right KJES and right ADFS of the intervention group did not show significant change when compared to the control. Conclusion:The chair-type training machine and the training program with this machine are safe and effective for increasing muscle strength.