Department of Kinesiology, McMaster University, Hamilton, Ontario, L8S4K1 Canada.
Psychol Health. 2009 Jan;24(1):49-65. doi: 10.1080/08870440801930312.
The combination of low physical activity rates and increased cardiovascular deaths indicate the overwhelming need for behaviour change interventions that can effectively promote physical activity among sedentary women. This 11-week randomised controlled trial examined the effects of an implementation intentions intervention on sedentary women's walking behaviour. Seventy-five women (M age = 48.17) were randomly assigned to either a control group where they were required to self-monitor their daily pedometer-determined step count or to an experimental group where they were asked to form specific walking plans (i.e. implementation intentions) every 6 weeks and to self-monitor their daily pedometer-determined step count. Measures of exercise intentions, perceived behavioural control, scheduling and barrier self-efficacy were administered at baseline, week 6 and week 11. Analyses indicated higher step counts over the first 6 weeks for women in the experimental condition (p < 0.02). Furthermore, higher self-efficacy to schedule (p < 0.01) and overcome walking barriers (p < 0.03), as well as higher perceptions of behavioural control (p < 0.02) were found at week 11 for women in the experimental versus control condition. However, none of the control beliefs were found to mediate the effects of the intervention on the women's walking behaviour. Furthermore, the intervention did not have any effect on the strength of the goal intention-behaviour relationship. The findings suggest implementation intentions are an effective strategy for initiating leisure-time walking within sedentary women.
低体力活动率和心血管死亡增加表明，迫切需要行为改变干预措施，以有效促进久坐不动的女性进行体力活动。这项为期 11 周的随机对照试验研究了实施意向干预对久坐不动的女性步行行为的影响。75 名女性（M 年龄=48.17）被随机分配到对照组，对照组要求她们自我监测每天计步器确定的步数；或实验组，实验组要求她们每 6 周制定具体的步行计划（即实施意向），并自我监测每天计步器确定的步数。在基线、第 6 周和第 11 周测量了锻炼意向、感知行为控制、计划安排和障碍自我效能感。分析表明，实验组女性在前 6 周的步数更高（p < 0.02）。此外，实验组女性在第 11 周时的计划安排（p < 0.01）和克服步行障碍的自我效能感（p < 0.03）以及感知行为控制（p < 0.02）更高。然而，在实验组和对照组的女性中，没有任何控制信念被发现可以调节干预对其步行行为的影响。此外，该干预措施对目标意图-行为关系的强度没有任何影响。研究结果表明，实施意向是在久坐不动的女性中启动休闲时间步行的有效策略。
