Ma Cheng, Chen Bo-Ching, Chen Mei-Yen
Department of Physical Education, University of Shanghai for Science and Technology, Shanghai 200093, People's Republic of China.
Undergraduate Program of Sports Coaching, CTBC Business School, Tainan 709301, Taiwan.
J Multidiscip Healthc. 2025 Feb 26;18:1163-1179. doi: 10.2147/JMDH.S503106. eCollection 2025.
To explore the impact and mechanism of weight status on the disordered eating behavior of university students, this study conducted a moderated chain mediation model based on the Escape Theory and the Strength Model of Self-Control.
This was a cross-sectional online study conducted at a university in Shanghai. The questionnaire was distributed via communication tools such as WeChat from March 6 to 15, 2022, receiving 2618 valid responses. The moderated chain mediation model was empirically examined with 10,000 Bootstrap samples using AMOS software.
(1) Weight status can indirectly predict disordered eating behavior through the mediating effect of body dissatisfaction (β = 0.24, 95% CI: 0.22-0.26, < 0.001); (2) Body dissatisfaction and negative affect play a chain mediation role in the positive impact of weight status on disordered eating behavior (β = 0.01, 95% CI: 0.01-0.02, < 0.001); (3) Physical activity moderates the positive impact of negative affect on disordered eating behavior (Diff = -0.11, = 2.20, < 0.05) and further plays a moderating role in the chain mediation model (Diff = -0.01, = 2.30, < 0.05). Specifically, the higher the level of physical activity among university students, the weaker the impact of negative affect on disordered eating behavior, and the weaker the chain mediation effect; (4) The level of physical activity moderates the relationship between weight status, body dissatisfaction, and disordered eating, suggesting that the higher the level of physical activity, the stronger the mediating role of body dissatisfaction between weight status and abnormal eating (Diff = 0.12, = 2.74, < 0.05).
These findings revealed the pathways through which weight status affects the eating behavior of university students and how physical activity might weaken or strengthen this impact. This research supplements prior studies and offers insight into health promotion for university students.
为探究体重状况对大学生饮食失调行为的影响及机制，本研究基于逃避理论和自我控制力量模型构建了有调节的链式中介模型。
这是一项在上海某大学开展的横断面在线研究。问卷于2022年3月6日至15日通过微信等通讯工具发放，共收到2618份有效回复。使用AMOS软件对10000个Bootstrap样本进行实证检验有调节的链式中介模型。
（1）体重状况可通过身体不满意的中介作用间接预测饮食失调行为（β = 0.24，95% CI：0.22 - 0.26，< 0.001）；（2）身体不满意和消极情绪在体重状况对饮食失调行为的正向影响中起链式中介作用（β = 0.01，95% CI：0.01 - 0.02，< 0.001）；（3）体育活动调节消极情绪对饮食失调行为的正向影响（差异 = -0.11，z = 2.20，< 0.05），并在链式中介模型中进一步起调节作用（差异 = -0.01，z = 2.30，< 0.05）。具体而言，大学生体育活动水平越高，消极情绪对饮食失调行为的影响越弱，链式中介效应也越弱；（4）体育活动水平调节体重状况、身体不满意与饮食失调之间的关系，表明体育活动水平越高，身体不满意在体重状况与异常饮食之间的中介作用越强（差异 = 0.12，z = 2.74，< 0.05）。
这些发现揭示了体重状况影响大学生饮食行为的途径以及体育活动如何减弱或增强这种影响。本研究补充了先前的研究，并为大学生健康促进提供了见解。
