Adolescence is an important stage of physical and mental growth. At this stage, sports training is often introduced to promote their physical and mental health. This paper attempts to disclose how continuous sports training affects the mental health of adolescents. First, the author discussed the relationship between sports training behavior of adolescents and the factors of mental health. Then, the mental health of adolescents was divided into positive mental health and non-positive mental

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... th. The latter was further split into mental sub-health and mental morbidity. On this basis, adolescents with no mental morbidity were selected for physical fitness test and psychological questionnaire survey. Through detailed analysis on the test results and survey data, it is concluded that more than 30% of adolescents are mentally sub-healthy; With mental subhealth, the adolescents have reduced cardiorespiratory endurance and the number repeat lateral-striding times; continuous sports training is conductive to self-awareness, self-regulation, physical health, mental health and psychological quality of adolescents. The research findings provide an important reference for improving the physical and mental growth of adolescents.