Thompson Debbe, Cantu Dora, Bhatt Riddhi, Baranowski Tom, Rodgers Wendy, Jago Russell, Anderson Barbara, Liu Yan, Mendoza Jason A, Tapia Ramsey, Buday Richard
JMIR Res Protoc. 2014 Mar 12;3(1):e14. doi: 10.2196/resprot.3074.
Physical activity decreases from childhood through adulthood. Among youth, teenagers (teens) achieve the lowest levels of physical activity, and high school age youth are particularly at risk of inactivity. Effective methods are needed to increase youth physical activity in a way that can be maintained through adulthood. Because teens text a great deal, text messages promoting walking, a low cost physical activity, may be an effective method for promoting sustainable physical activity.
The objective of our study was to determine the effect of pedometers, self selected step goals, and texts grounded in the self-determination theory (SDT) on physical activity among the teens.
"TXT Me!" was a 12 week intervention that texted 14-17 year olds to increase their daily physical activity by increasing the number of steps they take each day. The intervention was grounded in the SDT. Formative research with the teens helped construct the intervention and develop the texts. A total of 84 texts were developed (12 to set a step goal, and 72 promoting autonomy, competence, and relatedness). The pilot evaluation used a four group, randomized design (n=160). After baseline data collection, the participants were randomized to one of four conditions (no treatment control, pedometer only, pedometer + weekly prompts, pedometer + weekly prompts + SDT grounded texts). Data were collected at baseline and immediately upon completion of the study. The primary outcome was physical activity, measured by 7 days of accelerometry. Basic psychological needs, physical activity motivation, process evaluation, and program satisfaction data were also collected.
To our knowledge, this is one of the first studies to explore the use of stand alone, SDT grounded texts, supported by pedometers and prompts to set a self selected step goal, as a method for increasing physical activity among teens.
This pilot study will contribute valuable information regarding whether theoretically grounded text messages show promise as an effective method to increase physical activity among teens.
Clinicaltrials.gov NCT01482234; http://clinicaltrials.gov/ct2/show/NCT01482234 (Archived by WebCite at http://www.webcitation.org/6NYvRMOoq).
从童年到成年，身体活动量呈下降趋势。在青少年中，十几岁的青少年身体活动水平最低，而高中年龄段的青少年尤其面临缺乏运动的风险。需要有效的方法来增加青少年的身体活动量，并使其在成年后仍能保持。由于青少年大量使用短信，发送鼓励步行（一种低成本的身体活动）的短信可能是促进可持续身体活动的有效方法。
我们研究的目的是确定计步器、自我设定的步数目标以及基于自我决定理论（SDT）的短信对青少年身体活动的影响。
“给我发短信！”是一项为期12周的干预措施，通过给14 - 17岁的青少年发短信，增加他们每天的步数，从而提高他们的日常身体活动量。该干预措施基于自我决定理论。对青少年进行的形成性研究有助于构建干预措施并编写短信。共编写了84条短信（12条用于设定步数目标，72条用于促进自主性、能力和关联性）。试点评估采用四组随机设计（n = 160）。在收集基线数据后，参与者被随机分配到四个组之一（无治疗对照组、仅使用计步器组、计步器 + 每周提示组、计步器 + 每周提示 + 基于SDT的短信组）。在基线时和研究结束后立即收集数据。主要结果是身体活动量，通过7天的加速度计测量。还收集了基本心理需求、身体活动动机、过程评估和项目满意度数据。
据我们所知，这是首批探索将独立的、基于自我决定理论的短信，辅以计步器和设定自我选择步数目标的提示，作为增加青少年身体活动量方法的研究之一。
这项试点研究将为基于理论的短信是否有望成为增加青少年身体活动量的有效方法提供有价值的信息。
Clinicaltrials.gov NCT01482234；http://clinicaltrials.gov/ct2/show/NCT01482234（由WebCite存档于http://www.webcitation.org/6NYvRMOoq）。
