@文章{信息:doi/10.2196/28128，作者=“布莱克，梅丽莎和布吕内，詹妮弗”，标题=“可穿戴式活动跟踪器干预，有或没有每周行为支持邮件，以促进超重或肥胖女性的身体活动:随机对照试验”，期刊=“JMIR Mhealth Uhealth”，年=“2021”，月=“12月”，日=“16”，量=“9”，数=“12”，页=“e28128”，关键词=“行为改变;动机;肥胖;身体活动;女性;背景:体育活动(PA)在对抗当前肥胖流行中起着根本作用;然而，大多数超重或肥胖的女性通常都不运动。可穿戴活动追踪器干预可以帮助提高这一人群的PA水平。用行为支持邮件补充这些干预措施可能会进一步提高其有效性，但这仍有待证实。目的:本研究旨在确定在可穿戴式活动追踪器干预中添加行为支持邮件，与仅进行干预和对照组的可穿戴式活动追踪器相比，是否可以进一步提高超重或肥胖女性的PA水平。 Methods: Women with a BMI ≥25 kg/m2 who were not meeting the Canadian PA guidelines for aerobic and strength training were randomized into 1 of 3 groups. Group 1 received 6 weekly behavioral support emails, a wearable activity tracker, and a copy of the Canadian PA guidelines. Group 2 received a wearable activity tracker and a copy of the Canadian PA guidelines, and group 3 (control condition) received a copy of the Canadian PA guidelines. Self-reported data for walking and moderate to vigorous intensity PA were collected preintervention (week 0; prerandomization), postintervention (7 weeks postrandomization), and at follow-up (21 weeks postrandomization) and analyzed as metabolic equivalent of task minutes per week. In addition, potential mechanisms of behavior change (ie, basic psychological needs satisfaction and motivational regulations) were assessed for within- and between-group differences at all 3 time points. Data were analyzed using nonparametric statistical tests. Results: A total of 49 women were recruited; data from 47 women (mean age 37.57 years, SD 11.78 years; mean BMI 31.69 kg/m2, SD 5.97 kg/m2) were available for analysis. Group 1 reported a significant increase in walking from preintervention to postintervention ($\chi$22=7.5; P=.02) but not in moderate to vigorous intensity PA (P=.24). Group 1 also reported significant increases in perceptions of competence from preintervention to follow-up ($\chi$22=7.6; P=.02) and relatedness from preintervention to follow-up ($\chi$22=8.7; P=.005). Increases in perceived autonomy were observed for group 2 ($\chi$22=7.0) and group 3 ($\chi$22=10.6). There were no significant changes in the motivational regulations within the groups. The difference between the groups was not significant for any outcome variable. Conclusions: The results suggest that adding behavioral support emails to a wearable activity tracker intervention may help to increase time spent walking and perceptions of competence and relatedness for PA among women who are overweight or obese. Trial Registration: ClinicalTrials.gov NCT03601663; http://clinicaltrials.gov/ct2/show/NCT03601663 ", issn="2291-5222", doi="10.2196/28128", url="https://mhealth.www.mybigtv.com/2021/12/e28128", url="https://doi.org/10.2196/28128", url="http://www.ncbi.nlm.nih.gov/pubmed/34927590" }