Gillman Arielle S, Stevens Courtney J, Bryan Angela D
Department of Psychology & Neuroscience, University of Colorado Boulder.
Psychol Sport Exerc. 2021 May;54. doi: 10.1016/j.psychsport.2021.101888. Epub 2021 Jan 12.
Regular exercise is critical for disease prevention, but adherence to public health guidelines is poor. Exercise identity is purported to be associated with exercise behavior maintenance, but the extant literature is largely cross-sectional and of low/modest quality.
To examine change in exercise identity after completion of a supervised exercise intervention, as well as associations between change in exercise identity and exercise maintenance at 6-months follow-up.
= 276 insufficiently physically active women were randomized to a 16-week, supervised exercise training intervention with 4 conditions fully crossed on intensity (vigorous/moderate) and duration (long/short). Exercise identity was measured pre- and post-intervention and assessments of exercise motivation and behavior frequency were collected at 6-months post-intervention follow-up.
On average, participants experienced a statistically significant change in exercise identity over the course of the intervention, (128) = 7.94, < .001, but identity change scores did not differ across training conditions, = .91. Identity change was significantly positively related to changes in other theory-informed, motivation-based determinants of exercise, and predicted an additional 16.17 minutes of exercise per week, on average, at follow-up, = 16.76, (103) = 2.30, = .023.
Participants experienced increased self-identification with exercise after 16-weeks of training, but training volume did not influence the amount of identity change. As expected, greater change in exercise identity was associated with higher levels of exercise behavior at 6-months post-intervention follow-up (ClinicalTrials.gov number NCT02032628).
规律运动对疾病预防至关重要，但对公共卫生指南的依从性较差。运动身份被认为与运动行为的维持有关，但现有文献大多为横断面研究，质量较低/中等。
研究在完成有监督的运动干预后运动身份的变化，以及运动身份变化与6个月随访时运动维持之间的关联。
276名身体活动不足的女性被随机分为一个为期16周的有监督的运动训练干预组，该干预有4种条件，强度（剧烈/中等）和持续时间（长/短）完全交叉。在干预前后测量运动身份，并在干预后6个月随访时收集运动动机和行为频率的评估。
平均而言，参与者在干预过程中运动身份经历了统计学上的显著变化，（128）= 7.94，<.001，但身份变化分数在不同训练条件下没有差异，=.91。身份变化与其他基于理论的、基于动机的运动决定因素的变化显著正相关，并预测在随访时平均每周额外增加16.17分钟的运动，= 16.76，（103）= 2.30，=.023。
参与者在16周的训练后对运动的自我认同增加，但训练量并未影响身份变化的程度。正如预期的那样，在干预后六个月的随访中，运动身份的更大变化与更高水平的运动行为相关（ClinicalTrials.gov编号NCT02032628）。
