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What is the theory of successful aging?

According to a 2014 study published in *The Gerontologist*, the concept of "successful aging" is a widely discussed topic in gerontology, with numerous models proposed to define what is the theory of successful aging. The most prominent early definition, proposed by Rowe and Kahn, has since evolved with modern theories that emphasize adaptability, emotional well-being, and subjective satisfaction rather than just the absence of disease.