Just-in-Time Adaptive Interventions for Obesity

(Momentum Trial)

This trial aims to help people maintain weight loss more effectively through Just-in-Time Adaptive Interventions (JITAIs). Participants will receive support via a smartphone app that offers exercises using mindfulness, acceptance, and self-compassion when they regain weight. Others will receive standard weekly reminders about weight control strategies. This trial suits individuals who have lost at least 3% of their highest weight in the past three years, have a BMI between 25 and 50, wish to continue losing or maintaining weight, and can walk two city blocks without stopping. As an unphased trial, this study provides a unique opportunity to explore innovative weight maintenance strategies.

A previous study found that 74% to 100% of participants remained in the Just-in-Time Adaptive Interventions (JITAIs) program, with adherence rates ranging from 15.1% to 94.6%. These figures indicate that many participants can maintain the program, suggesting its safety and tolerability. JITAIs use real-time data to provide support precisely when needed, aiding in weight loss and maintenance. No specific reports of negative effects have emerged, indicating that these interventions are generally well-tolerated. However, as JITAIs are relatively new, research on their long-term safety continues.¹²³⁴⁵

Researchers are excited about the Just-in-Time Adaptive Interventions (JITAIs) for obesity because they offer a personalized approach to weight loss maintenance. Unlike standard methods that might focus solely on diet and exercise, JITAIs incorporate mindfulness, acceptance, and self-compassion strategies, helping participants respond more effectively to weight regain. This innovative blend of psychological techniques aims to address the emotional and mental aspects of weight management, potentially leading to more sustainable long-term results.

Research has shown that Just-in-Time Adaptive Interventions (JITAIs), which participants in this trial may receive, can help people manage their weight by providing support exactly when needed. Studies have found that these mobile tools can lead to a weight loss of 1–6 kg over six months. Staying engaged with the program is important; increased usage often results in better weight loss outcomes. Specifically, one study found that participants using this adaptive method maintained an average weight loss of 8.1% of their starting weight after 24 months. This evidence suggests that JITAIs can effectively help people maintain weight loss by offering timely and personalized support.¹²³⁴⁶