Pinto Bernardine M, Friedman Robert, Marcus Bess H, Kelley Heather, Tennstedt Sharon, Gillman Matthew W
Miriam Hospital (Pinto, Marcus), Providence, Rhode Island 02903, USA.
Am J Prev Med. 2002 Aug;23(2):113-20. doi: 10.1016/s0749-3797(02)00441-5.
There is increasing interest in developing interventions to promote physical activity (PA) that do not involve face-to-face contact with health professionals. We developed a fully automated PA counseling system (telephone-linked communication, TLC-PA) that was delivered via telephone.
A randomized, controlled trial with 298 adult, sedentary members (mean age, 45.9 years; 72% women; 45% white; and 45% African American) of a multi-site medical practice. The comparison group (TLC-Eat) received an automated intervention promoting healthy eating, which was also delivered via telephone.
The TLC-PA promoted moderate-intensity PA (MI-PA) based on the transtheoretical model of behavior change and social cognitive theory. The system was available to participants for 6 months.
Energy expenditure in MI-PA, proportion of participants who met recommendations for MI-PA, and motivational readiness for PA.
Self-reports of PA behavior and motivational readiness at baseline, 3 months, and 6 months.
At 3 months, intention-to-treat analyses showed that the TLC-PA group was more likely to meet recommendations for MI- or vigorous-intensity PA (VI-PA) compared to the TLC-Eat group (TLC-PA=26% vs TLC-Eat=19.6%, p=0.04). Among study completers, TLC-PA subjects reported significantly higher daily kilocalorie energy expenditure in MI-PA (2.3 kcal/kg/d vs 2.0 kcal/kg/d, p=0.02); a larger proportion met recommendations for MI- or VI-PA (31.2% vs 21.3%, p=0.02) and were in more advanced stages of motivational readiness than TLC-Eat subjects (TLC-PA=52.5% vs TLC-Eat=42.2%, p=0.04). Results were not maintained at 6 months. The proportion of TLC-PA users decreased significantly over the intervention period.
A fully automated counseling system had positive short-term effects on PA among sedentary adults. Lack of maintenance of effects may be due to a decrease in the number of participants who continued to use the system.
开发不涉及与健康专业人员面对面接触的促进身体活动（PA）的干预措施的兴趣日益浓厚。我们开发了一种通过电话提供的全自动PA咨询系统（电话链接通信，TLC-PA）。
一项针对多地点医疗实践的298名成年久坐成员（平均年龄45.9岁；72%为女性；45%为白人；45%为非裔美国人）的随机对照试验。对照组（TLC-Eat）接受通过电话提供的促进健康饮食的自动干预。
TLC-PA基于行为改变的跨理论模型和社会认知理论促进中等强度PA（MI-PA）。该系统可供参与者使用6个月。
MI-PA中的能量消耗、达到MI-PA建议的参与者比例以及PA的动机准备情况。
在基线、3个月和6个月时对PA行为和动机准备情况进行自我报告。
在3个月时，意向性分析表明，与TLC-Eat组相比，TLC-PA组更有可能达到MI或高强度PA（VI-PA）的建议（TLC-PA=26% vs TLC-Eat=19.6%，p=0.04）。在研究完成者中，TLC-PA受试者报告MI-PA中的每日千卡能量消耗显著更高（2.3千卡/千克/天 vs 2.0千卡/千克/天，p=0.02）；达到MI或VI-PA建议的比例更高（31.2% vs 21.3%，p=0.02），并且比TLC-Eat受试者处于更高级的动机准备阶段（TLC-PA=52.5% vs TLC-Eat=42.2%，p=0.04）。6个月时结果未维持。在干预期间，TLC-PA使用者的比例显著下降。
一种全自动咨询系统对久坐不动的成年人的PA有积极的短期影响。效果缺乏维持可能是由于继续使用该系统的参与者数量减少。
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