Geiker NRW, et al. – In this overview, researchers conclude the scientific data on the role mental stress (either in or not in association with impaired sleep) may play in poor sleep, enhanced appetite, cravings and decreased motivation for physical activity. They also review data for the role that lifestyle and stress management may play in achieving weight loss in stress–vulnerable individuals with overweight. It is demonstrated that all these factors contribute to weight gain and obesity, possibly via decreasing the efficacy of weight loss interventions.