Mobile phones using text messaging and monitoring have been shown to be useful additions to health programs. The objective of this study was to develop and evaluate a weight-loss intervention delivered by a smartphone app that supported individuals embarking on a diet and that was evidenced-based. Researchers developed and tested a mobile phone application (app) to support individuals embarking on a partial meal replacement program (MRP).
Overweight or obese women were randomly allocated to one of two study groups an intervention group and a control group. The intervention group received an MRP Support app. The control group received a static app based on the information available with the MRP. A total of 58 adult women) participated in the 8-week trial. Objective data suggested that users of the Support app were more engaged than those using the control app. Women in the intervention group reported a greater increase in positive affect (i.e. mood) than those in the control group. At Week 8, those in the control group reported a greater decrease in the effort they were willing to put into staying on the diet than those who received the Support app Preliminary data suggests that the MRP Support app has the potential to increase positive mood and maintain motivation during a weight loss programme. This study indicates that the support app could be a useful adjunct to existing MRPs for psychological outcomes.
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