Guideline-Based Digital Exercise Interventions for Reducing Body Weight and Fat and Promoting Physical Activity in Adults With Overweight and Obesity: Systematic Review and Meta-Analysis - Mohamad Motevalli; Clemens Drenowatz; Derrick Tanous; Gerhard Ruedl; Werner Kirschner; Markus Schauer; Thomas Rosemann; Katharina Wirnitzer (Interactive Journal of Medical Research)