Related Experiment Video
Updated: Feb 22, 2026

Physical Activity Measurement in Children Accepting Table Tennis Training
Published on: July 27, 2022
The Decline in Adult Activities Among U.S. Adolescents, 1976-2016
1San Diego State University.
Abstract:
The social and historical contexts may influence the speed of development. In seven large, nationally representative surveys of U.S. adolescents 1976-2016 (N = 8.44 million, ages 13-19), fewer adolescents in recent years engaged in adult activities such as having sex, dating, drinking alcohol, working for pay, going out without their parents, and driving, suggesting a slow life strategy. Adult activities were less common when median income, life expectancy, college enrollment, and age at first birth were higher and family size and pathogen prevalence were lower, consistent with life history theory. The trends are unlikely to be due to homework and extracurricular time, which stayed steady or declined, and may or may not be linked to increased Internet use.
Related Concept Videos
The Effect of Aging on Tissues
Bone Disorders
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
Cognitive Development During Adolescence
Emerging Adulthood
Erikson's Theory on Socioemotional Development during Adulthood
Intimacy Versus Isolation in Early Adulthood
Individuals in early...
Cognitive Development During Adulthood

