Consumers exert considerable time, energy, and financial resources toward achieving weight and body shape goals. However, weight management behaviors often become maladaptive (i.e., more harmful than helpful) and lead to increased chances for negative mental and physical results. An online panel (n = 412; M_age = 45.49; SD_age = 16.64; 61.4% female) was surveyed to assess how implicit mindset moderates the relationship between perfectionistic concern (self-criticism when the self is perceived to fall short of valued standards), perfectionistic striving (insistence on pursuing and achieving excessively high performance standards), and maladaptive weight management behaviors. This pre-registered study demonstrates that consumers high on perfectionistic concern who also hold a more growth implicit mindset engage in more maladaptive behavior; consumers who hold a more fixed implicit mindset engage in less maladaptive behavior regardless of their perfectionism. Importantly, our results indicate that high perfectionistic striving acts as an amplifier, enhancing implicit mindset's moderation of the relationship between perfectionistic concern and maladaptive behavior. We further demonstrate that this effect is most pronounced for maladaptive weight management behaviors which require greater persistence, such as cognitive restraint, excessive exercise, and muscle building. Implications for research and practice are discussed.

消费者花费大量时间、精力和财力来实现体重和体型目标。然而，体重管理行为往往变得不适应（即，弊大于利）并导致产生负面心理和身体结果的机会增加。在线面板（n = 412；M_年龄 = 45.49；SD_年龄 = 16.64; 61.4% 的女性）接受调查以评估内隐心态如何调节完美主义关注（当自我被认为达不到有价值的标准时的自我批评）、完美主义努力（坚持追求和实现过高的绩效标准）和适应不良之间的关系体重管理行为。这项预先注册的研究表明，高度关注完美主义的消费者也持有更多的成长内隐心态，他们会从事更多的适应不良行为；拥有更固定的内隐心态的消费者，无论他们的完美主义如何，都会有较少的适应不良行为。重要的是，我们的结果表明，高度完美主义的努力作为放大器，增强了内隐心态对完美主义关注与适应不良行为之间关系的调节作用。我们进一步证明，这种影响对于需要更大持久性的适应不良的体重管理行为最为明显，例如认知限制、过度运动和肌肉锻炼。讨论了对研究和实践的影响。