The global rise in the prevalence of overweight and obesity, and the disappointing outcomes of long-term weight loss interventions, necessitated an in-depth exploration of effective strategies for sustained weight loss maintenance. This thesis presented a comprehensive study, initiated with a systematic review to identify key themes and behavioural aspects that enhance the likelihood of maintaining long-term weight loss outcomes. Building upon this framework, the research advanced to an empirical investigation involving a primary-care based cohort of 21 individuals with overweight and obesity. Selected from diverse backgrounds within an evidence-based weight-management programme, participants were interviewed at baseline, and subsequently after one and two years, providing quantitative self-assessments of their experiences with weight loss. The study revealed that agile and continuous self-monitoring, in conjunction with personalised, sustainable lifestyle adaptations, significantly correlated with successful weight management outcomes. Many participants reported substantial health benefits and maintained weight loss, frequently attributing their motivation to supportive peer networks. However, this research also identified challenges such as anxiety, disappointment, and life disruptions as significant obstacles to success. Long-term success was found to depend on a robust support system, encompassing healthcare professionals, friends, and family. This research highlighted the complex nature of long-term weight loss maintenance, confirming the persistence of certain universal themes whilst also acknowledging individual variations in their importance over time. The thesis underscored the significance of extended support systems in meeting the diverse needs of individuals striving for sustained weight loss, providing invaluable insights for healthcare professionals and policymakers in the development of more effective weight management strategies
