A young adult is generally a person ranging in age from their late teens or early twenties to their thirties, although definitions and opinions, such as Erik Erikson 's stages of human development , vary. The young adult stage in human development precedes middle adulthood. A person in the middle adulthood stage ages from 40 or 41 to For a variety of reasons, timelines on young adulthood cannot be exactly defined—producing different results according to the different mix of overlapping indices legal, maturational, occupational, sexual, emotional and the like employed, or on whether 'a developmental perspective
Adolescent & Young Adult
Adolescent & Young Adult | Marian Koshland Science Museum
As individuals move through early and middle adulthood, a variety of physical changes take place in the body. As we age, our bodies change in physical ways. One can expect a variety of changes to take place through the early- and middle-adult years. Each person experiences age-related changes based on many factors: biological factors such as molecular and cellular changes are called primary aging , while aging that occurs due to controllable factors, such as lack of physical exercise and poor diet, is called secondary aging.
Sign up for Updates
The life stage called early adulthood defines individuals between the ages of 20 and 35, who are typically vibrant, active and healthy, and are focused on friendships, romance, child bearing and careers. Yet serious conditions, such as violent events, depression and eating disorders, can negatively impact young adults. Females reach their adult heights by age 18, and, except for some males who continue to grow in their early 20s, most have reached their adult heights by the age of However, muscles continue to gain mass - especially among males, and both genders continue to add body fat.
Emerging adulthood is a new developmental stage, taking place between adolescence and young adulthood, proposed by psychologist Jeffrey Jensen Arnett. It is defined as a period of identity exploration that takes place before individuals make long-term adult commitments. Arnett has argued that emerging adulthood should be added to the eight life stages in Erikson's stage theory. Critics contend that the concept of emerging adulthood is simply the product of contemporary socioeconomic conditions and is non-universal, and thus should not be considered a true life stage. In the middle of the 20th century, Erik Erikson proposed a stage theory of psychosocial development.