Principal Findings
weight loss
SAID
The findings revealed that a digital personalized WW program delivered under real-world conditions (meaning that it was delivered as it would be commercially such that participants were not reminded to attend meetings or followed up with if they missed meetings, as is often the case in weight loss trials) resulted in a mean weight loss of nearly 10 (SD 10.78) lb or 5.05% (SD 5.59%) of the baseline weight at 6 months, with 51% (78/153) of the sample losing ≥5%. A recent meta-analysis of 10 digital weight loss interventions revealed a mean weight loss of 5.3 (range 2.86-13.7) lb [Previous trials of personalized weight loss interventions have focused personalization on feedback [The PersonalPoints program was designed to encourage healthy diet choices, including intake of fruit, vegetables, and legumes, all of which have positive impacts on appetite and satiety [We also observed effects of the personalized program on physical activity, sedentary behavior, and sleep. The WW program allows users to add extra weekly PersonalPoints for the exercise they perform, with higher-intensity forms of exercise adding more points, which may motivate participants to exercise. Time spent in sedentary activities declined by an average of nearly 90 minutes per day, which is further evidence that the program nudged people toward more active lifestyles. WW describes The mindset component, the fourth pillar of the WW program, encompasses techniques from cognitive behavioral therapy and positive psychology to help users cope with setbacks, approach the process of weight loss with self-compassion, and stay focused on lifestyle changes that have a positive impact on overall well-being and happiness [This study can be considered in the context of trials of previous versions of the WW program. Tate et al [Workshop attendance varied across our trial as well as the 2 aforementioned trials using WW workshops [This study has limitations to consider. First, this was a single-arm trial, which means that the absence of a comparison group prevents comparisons with no treatment or other programs. That said, no-treatment control groups in weight loss trials produce negligible weight loss (ie, 0.2 lb) [