Psychiatry rResearch：饮食失调过量运动可预测自杀行为

　　美国迈阿密大学学者April Smith等人进行的一项研究显示，对于饮食失调者，过量运动或可作为预测其自杀行为的指标。

　　他们的研究纳入4项评估过量运动与自杀相关性的临床试验：

　　研究1：在204例女性饮食失调者当中，评估了过量运动是否可预测其自杀行为。

　　研究2：在171例大学生中评估了过量运动与获得性自杀风险（ACS）的相关性，随访时间达3-4周。

　　研究3：在467例大学生中对于疼痛不敏感能否解释过量运动与ACS的相关性进行探索。

　　研究4：在512例大学生中对ACS在过量运动与自杀行为两者相关性中所起的作用进行检测。

　　结果显示过量运动与自杀行为相关，该相关性或可被自杀者疼痛不敏感及获得性自杀风险相关所解释。上述相关性在上述4项临床试验的不同受试者中均有所体现。

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Exercise caution: Over-exercise is associated with suicidality among individuals with disordered eating
Abstract
We conducted four studies to examine the relationship between over-exercise and suicidality. Study 1 investigated whether over-exercise predicted suicidal behavior after controlling for other eating disorder behaviors in a patient sample of 204 women (144 with Diagnostic and Statistical Manual of Mental Disorders, 4th Edition (DSM-IV) Bulimia Nervosa [BN]). Study 2 tested the prospective association between over-exercise and acquired capability for suicide (ACS) in a sample of 171 college students followed for 3-4 weeks. Study 3 investigated whether pain insensitivity accounted for the relationship between over-exercise and ACS in a new sample of 467 college students. Study 4 tested whether ACS accounted for the relationship between over-exercise and suicidal behavior in a sample of 512 college students. In Study 1, after controlling for key covariates, over-exercise was the only disordered eating variable that maintained a significant relationship with suicidal behavior. In Study 2, Time 1 over-exercise was the only disordered eating behavior that was associated with Time 2 ACS. In Study 3, pain insensitivity accounted for the relationship between over-exercise and ACS. In Study 4, ACS accounted for the relationship between over-exercise and suicidal behavior. Over-exercise appears to be associated with suicidal behavior, an association accounted for by pain insensitivity and the acquired capability for suicide; notably, this association was found across a series of four studies with different populations.