New concept of the elderly

What is old? Domestic and foreign scientists on the old definition of old age, 10 multiple perspectives. World Health Organization and the Ministry of Public Health, China for the elderly over 60 years. But in real life, not difficult to find, with 60 people, but there are great disparities: some healthy, some sick; some apathetic; some healthy and strong, and some premature aging; the endless growth of heart and some despair. Apparently simple terms of age or older is very superficial to divide science. What exactly is the concept of the elderly? Is indeed a simple yet difficult question to answer. Here are some of the experts present the four views:
Determined under the age of the elderly
The so-called era of the age, that is born of age, is the individual left on earth after the mother of survival time. Western countries 45-64 years old as the beginning of 65-89, known as old age, 90 years old as of the old life. 55 developing countries for which men and women 50 years of age to old age limit. According to China's actual conditions, the provisions of 45-59 years old for the early period of old age ,60-79 years as the period for the longevity of more than 80 years of age. Determined based on the physiological age of the elderly
The so-called physiological age refers to individual cells, tissues, organs, systems of physiological state, physiological functions and responses of these physiological state and function of the individual to determine the age. Chronological age can be divided into four periods: birth to 19 years for the growth and development of ,20-39 years ,40-59 years to mature as early aging. 60 more than the aging of the internal. Therefore, the physiological age of people aged over 60 is considered old. But the physical meaning of age and years of age is different, and often not synchronized. Determination of physiological age, the main use of blood pressure, respiration, vision, hearing, blood, grip strength, skin elasticity and many other physiological indicators to decide.
Determined according to mental age old
The so-called mental age is based on the activities of individual psychology to determine the extent of the individual ages. Mental age of consciousness and personality are the main measure of its content. Mental age is divided into three periods: birth to 19 years ,20-59 years old is not mature to mature, over 60 years for the aging period. Mental age of people aged over 60 is considered old. Mental age and chronological age is not the same meaning, it is not synchronized. Such as the age of 60 years, his mental age may be only four or five years old.
According to the community to determine the age old
Age is based on a so-called social contact with other people in the role to determine the role of the individual ages. That the higher a person's social status, the role of the larger society the more mature aged. In summary,'s age, physiological age, mental age and social age, period, under the age of parents, in stone, but physiological age, mental age and social age, but by physical exercise, personal efforts to change, delay aging, make up its shortcomings. Thus, a person is aging, can not simply look at the age of birth, depends on physiological age, especially in mental age, mental state of human life have a strong reaction. So long as the elderly to enhance training, not only make the physical health, but also psychologically forever young.