Abstract：
OBJECTIVE: A growing body of research, primarily cross-sectional, suggests a relationship between the practice of tracking one\'s food intake and exercise behaviors using fitness-tracking smartphone applications (\"apps\") or wearable devices (\"wearables\") and disordered eating symptomatology. The aim of the present study was to explore longitudinal relationships between fitness tracking and disordered eating outcomes among college-aged women, as well as to determine whether the individual-level risk factors of pre-existing eating concerns, perfectionism, and rumination about food moderated the relationship.
METHODS: N = 68 female undergraduates used the MyFitnessPal app for 8 weeks while completing a series of self-report measures.
RESULTS: At the trait level, fitness tracking frequency was positively associated with weight/shape concerns, but not with the other outcome measures. Daily levels of fitness tracking did not predict next-day levels for any of the outcome measures. Within-day fitness tracking at one timepoint was associated with lower reports of dietary restraint efforts at the next timepoint. None of the proposed moderators significantly interacted with the relationships over time.
CONCLUSIONS: These results suggest that while those who engage in fitness tracking may experience higher weight/shape concerns as a trait, over time fitness tracking was not associated with an increase in concerns. Further work exploring whether fitness tracking may affect particular subgroups in different ways is warranted.
METHODS: N = 68 female undergraduates used the MyFitnessPal app for 8 weeks while completing a series of self-report measures.
RESULTS: At the trait level, fitness tracking frequency was positively associated with weight/shape concerns, but not with the other outcome measures. Daily levels of fitness tracking did not predict next-day levels for any of the outcome measures. Within-day fitness tracking at one timepoint was associated with lower reports of dietary restraint efforts at the next timepoint. None of the proposed moderators significantly interacted with the relationships over time.
CONCLUSIONS: These results suggest that while those who engage in fitness tracking may experience higher weight/shape concerns as a trait, over time fitness tracking was not associated with an increase in concerns. Further work exploring whether fitness tracking may affect particular subgroups in different ways is warranted.
摘要：
目标：越来越多的研究机构，主要是横截面，建议使用健身跟踪智能手机应用程序（“应用程序”）或可穿戴设备（“可穿戴设备”）跟踪一个人的食物摄入量和运动行为与无序饮食症状之间的关系。本研究的目的是探讨适龄女性健康跟踪与饮食紊乱结果之间的纵向关系，以及确定预先存在的饮食问题的个体层面的风险因素，完美主义,对食物的反思缓和了这种关系。
方法：N=68名女大学生在完成一系列自我报告措施的同时，使用了MyFitnessmap应用程序8周。
结果：在特征级别，健身追踪频率与体重/形状问题呈正相关，但不是其他结果指标。每日健身追踪水平无法预测任何结果指标的第二天水平。在一个时间点的一天内适应性跟踪与下一个时间点的饮食限制努力的较低报告相关。随着时间的推移，拟议的主持人都没有与这些关系进行显著互动。
结论：这些结果表明，尽管从事健身追踪的人可能会遇到更高的体重/形状问题，随着时间的推移,健康跟踪与担忧的增加无关.需要进一步的工作来探索适应度跟踪是否会以不同的方式影响特定的子组。
方法：N=68名女大学生在完成一系列自我报告措施的同时，使用了MyFitnessmap应用程序8周。
结果：在特征级别，健身追踪频率与体重/形状问题呈正相关，但不是其他结果指标。每日健身追踪水平无法预测任何结果指标的第二天水平。在一个时间点的一天内适应性跟踪与下一个时间点的饮食限制努力的较低报告相关。随着时间的推移，拟议的主持人都没有与这些关系进行显著互动。
结论：这些结果表明，尽管从事健身追踪的人可能会遇到更高的体重/形状问题，随着时间的推移,健康跟踪与担忧的增加无关.需要进一步的工作来探索适应度跟踪是否会以不同的方式影响特定的子组。
