en روان شناسی تکاملی Evolutionary Psychology پژوهشي Original <div style="text-align: justify;"><span style="line-height:2;"><span style="color:#6600ff;"><span style="font-size:14px;"><span style="font-family:Times New Roman;">The purpose of this study was to investigate the effect of dynamic schoolyards on students&rsquo; mental and physical health. The research employed a quasi-experimental design. The statistical population consisted of fifth- and sixth-grade elementary school students in Yazd whose schools had implemented a dynamic schoolyard design. According to reports from the Planning and Construction Department of the Yazd Educational Administration, the dynamic schoolyard design had been implemented in four schools, with a total student population of 400. Based on the Morgan table, a sample of 136 fifth- and sixth-grade students was selected. Data were collected using a questionnaire designed to assess the effects of dynamic schoolyards on students&rsquo; mental and physical health. The questionnaire consisted of 25 items across four components: physical health, anxiety and sleep disturbance, social functioning, and depressive symptoms. Participants completed the questionnaire using a five-point Likert scale. A paired-samples t-test was used to test the hypotheses. The results showed that the implementation of the dynamic schoolyard design had a significant effect on both physical health (P = 0.001) and mental health (P = 0.001) among female elementary school students in Yazd. Based on the findings, it can be concluded that the implementation of dynamic schoolyard designs is associated with improvements in students&rsquo; physical and mental health. Therefore, greater attention should be given to implementing this design in schools by educational authorities.</span></span></span></span></div> Dynamic yard design, Physical health, Mental health, Elementary schools 223 230 http://ieepj.hormozgan.ac.ir/browse.php?a_code=A-10-1187-1&slc_lang=en&sid=1 Mohammad Sadegh Zare dr.m.s.zarea@gmail.com 100319475328460012473 100319475328460012473 Yes PhD in Physical Education and Sports Sciences- Sports Physiology Specialization - Department of Education of Yazd Province, Yazd, Iran