The Longitudinal Influence Between School Sports Atmosphere and Non-Suicidal Self-Injury Among Adolescents: The Chain Mediation Effect of Perceived Teacher Justice and Body Shame
This longitudinal study of 1,493 Chinese adolescents reveals that a positive school sports atmosphere significantly reduces non-suicidal self-injury both directly and indirectly through the independent and chained mediating effects of perceived teacher justice and body shame.
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In the complex landscape of adolescent development, the school environment acts as a powerful current, shaping how young people navigate their emotions and relationships. Among the various forces at play, the atmosphere surrounding physical activity holds a unique position. When a school fosters a positive sports culture—one defined by encouragement, inclusion, and fair play—it does more than just improve physical fitness; it creates a psychological safety net. This environment interacts with how students perceive the fairness of their teachers and how they feel about their own bodies. These internal perceptions are critical because they influence a dangerous behavior known as non-suicidal self-injury. This term describes when young people intentionally harm their own bodies, such as by cutting or burning, without the intent to die. While these acts do not result in death, they are a severe sign of emotional distress and a significant risk factor for future suicide attempts. Understanding the invisible threads that connect a supportive sports environment to a reduction in these harmful behaviors is essential for protecting the mental well-being of the next generation.
Researchers at Northeast Normal University and Shenzhen University set out to trace these connections over time, moving beyond a simple snapshot of student life to observe how these factors evolve together. They followed a large group of 1,493 students across China, surveying them twice over a seven-month period. The team measured four specific elements: the overall sports atmosphere in the school, the students' perception of whether their teachers treated them fairly, the level of shame they felt about their bodies, and the frequency of their self-injury behaviors. By tracking these variables from the beginning of the study to the end, the researchers could determine not just if things were related, but how a positive start in one area might lead to better outcomes in another months later.
The study confirmed that a positive school sports atmosphere acts as a protective shield against self-injury. Students who reported a more encouraging and supportive environment for sports at the beginning of the study were significantly less likely to engage in self-harm seven months later. However, the researchers discovered that this protection does not happen in a vacuum. It flows through two distinct psychological pathways. First, a positive sports environment helps students feel that their teachers are just and fair. When students see that rules are applied consistently and that they are treated with respect during physical activities, they develop a stronger sense of teacher justice. This feeling of fairness, in turn, lowers the risk of self-injury. It suggests that when young people feel the world around them is governed by fairness, they are less likely to turn their anger or distress inward.
The second pathway involves the body. A supportive sports atmosphere helps reduce the shame students feel about their physical appearance. In many school settings, sports can inadvertently highlight differences in body shape or ability, leading to feelings of inadequacy. Yet, when the atmosphere is positive, it shifts the focus toward effort, improvement, and participation rather than just appearance. This shift helps students feel less ashamed of their bodies. Since body shame is a known driver of self-injury, reducing this shame directly lowers the risk of harmful behaviors. The study found that the more a student felt their body was a source of shame, the more likely they were to engage in self-injury, reinforcing the idea that how a young person views their own physical self is deeply tied to their mental safety.
Perhaps most revealing was the discovery of a chain reaction linking these factors together. The researchers found that a positive sports atmosphere boosts a student's belief in teacher fairness, and this increased sense of fairness subsequently reduces body shame. In other words, when teachers treat students fairly in the context of sports, it helps students stop judging themselves so harshly based on their physical appearance. This chain of events—starting with a good sports environment, moving through a sense of fairness, and ending with reduced body shame—ultimately leads to a significant decrease in self-injury. The data showed that this chain effect, along with the individual effects of teacher fairness and body shame, accounted for nearly half of the total protective influence that a good sports atmosphere has on students.
These findings offer a clear, actionable map for schools and educators. The research suggests that creating a healthy sports environment is not merely about building better gyms or organizing more games; it is about cultivating a culture of fairness and body acceptance. When schools prioritize fair treatment from teachers and create an inclusive space where students feel valued for their effort rather than their appearance, they are actively building a barrier against self-harm. The study indicates that by focusing on these specific psychological mechanisms, schools can intervene in the cycle of distress that leads to self-injury. The results do not promise a perfect solution, but they provide a strong, evidence-based direction: fostering a just and body-positive sports culture is a vital step in safeguarding the mental health of adolescents.
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