Matthew J. Landry, Zohaib Bagha
BACKGROUND: Lifestyle modification remains the cornerstone of obesity management, serving as an essential component of all treatment plans, even in an era of effective pharmacotherapy. SOURCES OF MATERIAL: This review examines the key elements of lifestyle interventions, their mechanisms of action, implementation strategies, and challenges in clinical practice. It additionally discusses the evolving role of lifestyle modification when integrated alongside new pharmaceutical advances, particularly glucagon-like peptide-1 receptor agonists, and how these combined approaches may optimize outcomes in obesity treatment. ABSTRACT OF FINDINGS: Effective implementation of lifestyle modification requires a multidisciplinary approach, incorporating exercise counseling, medical nutrition therapy, and behavioral change strategies to address the complex nature of obesity. Nutritional approaches, including various evidence-based dietary patterns, function by creating energy deficits and altering metabolic pathways that influence weight regulation. Physical activity complements dietary interventions by increasing energy expenditure, improving body composition, and enhancing metabolic health. Studies have demonstrated benefits of physical activity for both weight loss and maintenance. Behavioral change techniques are critical for developing sustainable habits, overcoming psychological barriers, and facilitating long-term adherence to lifestyle modifications. CONCLUSION: Despite evidence supporting lifestyle modification, challenges limit its use within obesity care, including poor long-term adherence, limited access to specialized facilities and professionals, and inadequate reimbursement for these clinical services.