PurposeTo explore the relationship between Chinese middle school students' lifestyles and psychological symptoms and compare the differences between genders.MethodUsing the method of stratified cluster sampling, 14,356 students aged 13–18 years from 8 cities in China were selected as participants. The Multidimensional Sub-health Questionnaire of Adolescents was used to estimate psychological symptoms. Chi-square test and Logistic regression analysis were used to analyze the relationship between lifestyle and psychological symptoms.ResultsThe psychological symptom detection rate of Chinese middle school students was 21.37%. The detection rate of psychological symptoms for boys was 22.1%, which was significantly higher than for girls (20.64%, χ2 = 4.608, P < 0.05). According to the Logistic regression analysis, factors that have a positive correlation with the demonstration of psychological symptoms (P < 0.01) include: how the students go to school (by foot or on the vehicle) (OR = 1.16, 95% CI: 1.07–1.25); inadequate time for sleep (OR = 1.48, 95% CI: 1.28–1.72); video watching time ≥2 h/d (OR = 1.25, 95% CI: 1.13–1.39); never exercise (OR = 2.39, 95% CI: 2.07–2.76); never participate in extracurricular exercises (OR = 1.45, 95% CI: 1.27–1.66); have breakfast occasionally (OR = 1.35, 95% CI:1.22–1.50); never have breakfast (OR = 1.90, 95% CI: 1.62–2.24); always have snacks (OR = 1.27, 95% CI: 1.13–1.44); always drink sugared beverages (OR = 1.37, 95% CI: 1.22–1.55); picky with food occasionally (OR = 1.22, 95% CI: 1.11–1.33).ConclusionsThere was a positive correlation between unhealthy lifestyle and the occurrence of psychological symptoms, and boys are more easily influenced by lifestyles than girls.
Background Studies indicate that muscle strength is associated with good mental health. However, it remains unclear whether muscle strength is directly correlated with psychological symptoms in Chinese adolescents. Given the declining muscle strength and worrying mental health status of Chinese adolescents, the present study aimed to estimate the correlation between muscle strength and psychological symptoms as well as explore the gender differences in those correlations in Chinese adolescents. Method From April to July 2018, a total of 14,344 Chinese adolescents from eight provinces were selected using a stratified clustered sampling method. Psychological symptoms were evaluated using the Multidimensional Sub-health Questionnaire of Adolescents (MSQA), a verified and validated questionnaire that assesses three psychological areas: emotional symptoms, behavioral symptoms, and social adaptation difficulties. Muscle strength was assessed using grip strength, sit-ups, and standing long jump. The Chi-square test was used to compare the detection rates of the different categories of psychological symptoms. A logistic regression analysis was used to analyze the correlations between muscle strength and psychological symptoms and explore the gender differences in those correlations in Chinese adolescents. Results In general, the detection rate of psychological symptoms for Chinese adolescents was 21.39%. Males had a higher detection rate of psychological symptoms (22.12%) than females (20.66%, p < 0.05). Psychological symptoms were present in significantly fewer Chinese adolescents with a muscle strength index >P75 (19.26%) than among Chinese adolescents with a muscle strength index ≤P25 (23.00%) (χ2 = 23.417, p < 0.01). Compared with females, the OR values for males in most groups were over one (OR = 1.04–1.43), indicating that males have a higher risk of psychological symptoms than females. Conclusions The psychological symptom detection rate of Chinese adolescents is correlated with muscle strength. Psychological symptoms were more correlated to muscle strength in males than in females. The significance of the present study lies in the important insights for integrated mental and physical fitness intervention strategies that promote muscle strength and psychological symptoms simultaneously.
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