Adherence to 24-h movement guidelines reduces non-suicidal self-injury odds in adolescentsMovement Guidelines Linked to Lower Risk of Self-Injury in Teens
Frontiers in MedicinePublished September 12, 2026DOI ↗Editorial oversight: Dr. Sofia Müller, MD · Lifespan & Whole-Person Care
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Key Takeaway
Note that adherence to 24-h movement guidelines, especially sleep, is associated with lower odds of adolescent NSSI.
This guideline is based on an observational study involving 4,205 adolescents in five Chinese cities. The study evaluated the association between adherence to 24-h movement guidelines—comprising moderate-to-vigorous physical activity, screen time, and sleep duration—and the prevalence of non-suicidal self-injury (NSSI). The reported NSSI prevalence was 35.29%.
Key findings indicate that adhering to more guidelines is associated with lower odds of NSSI. Specifically, the odds ratio (OR) for 1 guideline vs. 0 was 0.72 (95% CI 0.62, 0.83), for 2 guidelines vs. 0 was 0.44 (95% CI 0.36, 0.54), and for 3 guidelines vs. 0 was 0.31 (95% CI 0.15, 0.65). Combinations including sleep were associated with lower odds of NSSI (p < 0.05). While the comparison between 3 and 2 guidelines was not significant (OR 0.72, 95% CI 0.34, 1.49), isolated MVPA guidelines showed no significant effect (OR 1.15, 95% CI 0.74, 1.80).
Psychological health was found to significantly mediate the relationship between movement guidelines and NSSI. Additionally, sex-based differences were noted, with stronger negative associations observed in girls for certain combinations. Clinicians may consider promoting these movement guidelines, especially sleep, as a management strategy for adolescent NSSI risk, while noting that the evidence is observational and does not establish causality.
How this fits prior evidence
This finding addresses a gap in understanding behavioral interventions for non-suicidal self-injury (NSSI) by highlighting the role of physical activity and sleep. It complements existing evidence regarding the bidirectional links between social networking addiction and NSSI in Chinese students and the role of adverse childhood experiences as risk factors for NSSI. While previous evidence focused on neurophysiological correlates and psychosocial risk factors, this data explores the impact of daily movement habits on NSSI risk.
This observational study looked at how daily habits affect the risk of non-suicidal self-injury (NSSI) in over 4,000 adolescents across five cities. Researchers looked at three specific goals: getting enough sleep, getting enough exercise, and limiting screen time. They found that teens who followed more of these guidelines had lower odds of engaging in self-injury.
One of the most notable findings was that including sleep in the daily routine was particularly important. The study also noted that these positive links were even stronger for girls. These findings suggest that promoting healthy habits like better sleep and more movement could be a helpful way to support the mental health of teenagers.
Because this was an observational study using self-reported surveys, it shows a link rather than a direct cause. The results are not intended to replace professional mental health care. Parents and doctors can use these findings to see how daily habits and sleep might play a role in a teenager's overall well-being.
What this means for you:
Better sleep, exercise, and screen time habits are linked to lower self-injury risks in adolescents.
Common questions
What specific habits were linked to lower risk?
The study looked at three main goals: moderate-to-vigorous physical activity, limited screen time, and sufficient sleep duration. Teens who followed more of these three guidelines showed lower odds of non-suicidal self-injury. Specifically, following three guidelines showed a much lower risk than following only one or none.
Is sleep particularly important for teenagers?
Yes, the study found that combinations of guidelines that included sleep were linked to lower odds of self-injury. The data suggests that focusing on sleep as part of a daily routine is a key factor in the findings for adolescent mental health.
Are there differences between boys and girls?
The study found significant differences based on sex. Specifically, the link between following movement guidelines and lower risk of self-injury was stronger in girls. This suggests that these habits may be especially important for girls' mental health.
BackgroundAdolescent non-suicidal self-injury (NSSI) is a growing public health concern. Adherence to 24-h movement guidelines yields notable health benefits, yet no studies have explored its association with adolescent NSSI. This study examined this association, alongside the moderating effect of sex and mediating role of psychological health (PH).MethodsA total of 4,205 adolescents from five central Chinese cities were recruited. Self-reported questionnaires assessed sociodemographic characteristics, moderate-to-vigorous physical activity (MVPA), screen time, sleep duration, NSSI, and PH. Logistic regression analyzed associations between 24-h movement guideline adherence and NSSI; sex moderation was tested via interaction terms, and PH mediation via the PROCESS macro.ResultsNSSI prevalence was 35.29%, while only 1.28% adhered to all three guidelines. Compared with adherence to none, meeting more guidelines was associated with progressively lower NSSI odds [1 vs 0: OR = 0.72, 95% CI (0.62, 0.83); 2 vs. 0: OR = 0.44, 95% CI (0.36, 0.54); 3 vs. 0: OR = 0.31, 95% CI (0.15, 0.65)]. However, adherence to three guidelines did not significantly further reduce risk vs. two [OR = 0.72, 95% CI (0.34, 1.49)]. Among equivalent adherence levels, combinations including the sleep guideline were associated with lower NSSI than those without (p < 0.05). Isolated MVPA guideline adherence showed no association with NSSI [OR = 1.15, 95% CI (0.74, 1.80)]. Sex significantly moderated the association for two guidelines and the “screen + sleep” combination (p < 0.05), with stronger negative associations in girls. PH significantly mediated the relationship.ConclusionPromoting adherence to 24-h movement guidelines, particularly the sleep guideline, may help manage adolescent NSSI risks, with emphasis on PH promotion and attention to sex differences.
