People are living longer and most countries are experiencing unprecedented increases in the number and proportion of their elderly populations, resulting from declines in mortality, lower fertility, and the baby boom cohorts entering old age. A fundamental issue facing the global community is meeting the challenges of population aging and achieving healthy aging to maintain an active older population and reduce the number of disabled people. Healthy aging is obviously a major goal of all societies and is the central theme of this book.

The focus of this book is on theoretical...