In gerontology, researchers pay attention to the physiological changes of the elderly, such as the weakening of muscle strength, the decrease of bone density and the decline of cognitive ability. They try to understand the mechanism of these changes and find ways to prevent and treat them.
In geriatric psychology, researchers pay attention to the psychological changes of the elderly, such as mood swings, memory decline, loneliness and so on. They try to understand the reasons for these changes and find ways to improve the mental health of the elderly.
In the sociology of aging, researchers pay attention to the status and role of the elderly in society, such as retirement lifestyle, family relations, community participation and so on. They try to understand the social problems faced by the elderly and find ways to solve them.
In gerontology, researchers pay attention to the health problems of the elderly, such as chronic diseases, disabilities and nursing needs. They try to understand the causes and development trends of these problems and find ways to improve the health status of the elderly.