International Journal of Preventive Medicine (Int J Prev Med)2008-78021192020102523502350ENDepartment of Biomedicine and Prevention, Faculty of Medicine and Surgery, University of R20201025Dear Editor, Green exercise is a form of physical activity that takes place outdoors in natural green environments. There is a need for mental health promotion among adolescents through physical activity because lack of physical activity may be associated with an unhealthy lifestyle.http://ijpm.mui.ac.ir/index.php/ijpm/article/view/2350