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Background In recent years, high-risk sexual behaviors due to their negative consequences both for the individual and society have received more attention than other high-risk behaviors. Objective The aim of this study was to review the influencing factors of high-risk sexual behaviors among young people from an ecological point of view. Methods This review was conducted through searching databases including PubMed, Web of Science, Scopus, Google Scholar and the Cochrane Library with keywords such as sexual risk-taking behavior, high-risk sex, unprotected sex and unsafe sex. The relevant papers published between 1995 and 2016 were extracted. After reviewing the abstract and full text of the articles, 45 papers were used to write this article. Results From an ecological theory approach, factors which influence high-risk sexual behaviors are divided into three categories - the microsystem, the mesosystem and the macrosystem. The microsystem includes factors such as age, gender, race, marital status, place of residence, religion, level of education, personality traits, psychological problems, childhood experiences, body image and coincidence of high-risk behaviors; the mesosystem includes factors such as family structure, peers and sex education; in the macrosystem, the impact of culture and traditions of the society, economic status and the media are presented. Conclusion Given that high-risk sexual behaviors often have multiple causes, it seems that health policymakers must consider multi-dimensional interventions to influence high-risk sexual behaviors based on the ecological approach.

Aim Although it showed that poor body image may drive an individual to unhealthy dietary behaviors, but less is known about the role of emotional health and interpersonal relationships in this regard in different age group of population. This study aimed to investigate the association between body image, emotional health, relationships, and unhealthy dietary behaviors among medical sciences students. Methods In this cross‐sectional study, using a three‐stage stratified sampling method, 248 Iranian medical sciences students were recruited. The participants completed self‐administered questionnaires, including Youth Risk Behavior Survey Questionnaire, Adolescent Health Concerns Inventory, and Body Image Concern Inventory. The data were analyzed using SPSS‐20 and structural equation modeling in the Amos software version 24. Results The results indicate the acceptability of the goodness of fit model index. Direct association of body image with emotional health (β = 0.91, p = 0.005) and relationships (β = 0.88, p = 0.009) was significant, but any direct and indirect association between body and unhealthy dietary behaviors was not found. Conclusion This study underlines the importance of being aware of the association between body image, emotional health, and relationships Further studies are recommended to explore the relationship between these factors and unhealthy dietary behaviors in medical sciences students.