Middle-aged refers to a stage of life typically characterized by individuals who are between the ages of 40 to 65 years old. This research area focuses on studying various aspects of this life stage, including physical health, mental health, social relationships, career and economic stability, and life transitions. Researchers in this area may examine topics such as the impact of aging on cognitive abilities, strategies for maintaining overall health and well-being in middle age, and the role of social support in navigating midlife challenges. Understanding the unique needs and experiences of middle-aged individuals can provide valuable insights for developing interventions and support systems to promote healthy aging and quality of life during this stage of life.