Adolescents are among the most important assets any country has, and any psychosocial vulnerability among this age group will have detrimental consequences. Adolescents’ and young people’s health is strongly correlated with their health-related behaviors (
1). Adolescence is a period of great and rapid emotional, physical, and social change, and a period in which the individual learns and develops self-esteem, self-control, independent decision-making, autonomy, and a sense of responsibility, as well as a period of making important decisions about health, family, work, and choice of friends, and the acquisition of social skills to assume future roles and responsibilities (
2). Being prone to risk-taking, adolescents are likely to engage in high-risk behaviors in an attempt to consider and try different behaviors, experiment with various roles, sometimes even with flagrant disregard for rules and regulations, unless a precise model of social norms is defined and set for them (
3). With more than 15 million adolescents accounting for a quarter of its population, Iran is among the youngest countries in the world (
4). In young societies, high-risk behaviors occur in many forms (
5). Various studies have also shown an increase in the incidence of high-risk behaviors among adolescents (
6). In the 2016 census, the population of Iran was estimated to be 79,926,270 individuals, approximately 25.1% (20,053,009) of which belonged to the 15 - 24 age group (
7).
Risky behaviors are a set of behaviors that can cause not only serious harm to an individual and his/her loved ones, but also unintentional harm to innocent people (
8). Familial factors (parental substance abuse), intrinsic characteristics (an individual’s temperament) (
9), increased conflicts and breakdown of parent-child relationships due to increased adolescent relationships with different peer groups, and increased risk-taking in comparison with other developmental stages are considered to be among factors contributing to the inclination of adolescents towards high-risk behaviors (
5). Behaviors such as drug use, alcohol consumption, smoking, physical confrontations and violence, illicit sexual intercourse, reckless driving, and carrying firearms or melee weapons are considered high-risk behaviors (
10,
11), with psychological and physical consequences, such as depression (
12), premature death (
13), AIDS and sexual diseases (
14), academic failure, and low academic motivation (
15). Many high-risk behaviors, such as unprotected sexual intercourse and 90% of the first instances of smoking and drug use, occur in adolescence before the age of 18 (
16). According to a worldwide study on tobacco use in 43 countries, the average prevalence of smoking among adolescents was reported as 33%, and nearly 25% of students who smoked had first smoked before the age of 10 (
17). On the other hand, the earlier individuals start smoking and using drugs, the less likely they are to fully quit them in adulthood (
18).
Aggression is a complex phenomenon influenced by contextual and psychological factors, as well as genetic factors (
19). Social psychologists define aggression as physical or verbal acts or expressions of suffering, hatred, and criticism to inflict physical or psychological harm, pain, and suffering (
20). In a 1995 study, in a response to a question about the causes of violent behavior, students mentioned membership in criminal gangs (35%), lack of parental supervision (35%), peer influence (35%), and poverty as factors contributing to the occurrence of violence (
21). According to health theories, preventive programs in adolescence are more effective and beneficial than measures that are subsequently taken to correct the unintended consequences of high-risk behaviors for the individual and society (
22). Therefore, it is necessary to develop strategies to educate and reduce adolescents’ risky behaviors.
One of the strategies to reduce risky behaviors in adolescents is to educate them on these issues. Effective education will improve the level of awareness and performance, as well as mental and physical health, reduce the likelihood of progressive complications, and increase the sense of responsibility to eliminate or change inappropriate behaviors (
23). An effective training method is life skills training, which includes the set of abilities that facilitate adjustment and positive and beneficial behaviors, as a result enabling the individual to take on responsibilities and roles without harming him/herself and others and to deal with the challenges and requirements of daily life effectively. The objective of life skills training is to promote the individual’s adjustment with oneself, others, and the environment (
24). So far, no studies have been conducted on the effects of life skills training on high-risk behaviors of students in Iran. Therefore, we decided to conduct this study due to cultural and social differences in different countries.