EPI OF PHYSICAL ACTIVITY: TEENAGE TO ADULT YEARS

身体活动（PA）已被确定为国家优先领域 促进美国人民的健康。 虽然健康 积极的生活方式的好处是有据可查的成年人， 美国成年人口中不活动的流行率仍然很高。是 人们普遍认为，预防成年人的身体活动是 最好是通过建立一个身体活跃的生活方式， 将持续到成年的青春。 然而，缺乏 关于儿童和成人体力活动之间关系的数据 没有证据表明一个活跃的孩子会变成一个活跃的成年人。 本研究的总体目标是研究 青少年体育活动和青年体育活动 成年 这项研究是对1245名年轻人的随访研究， 21-25岁，他们最初代表一个基于双胞胎人群的队列 1990年招募参加NIH资助的纵向研究， 青少年伤害的发生率和决定因素， 伤害控制研究（AICS）。参与者的基线年龄为12- 16岁 在此期间收集了大量的体力活动数据， AICS的四年 在本研究中，将使用 与青少年中使用的相同的标准化问卷 study. 要收集的其他数据包括社会人口统计数据（即， 教育、婚姻状况、职业），生活方式因素（即， 吸烟和饮酒），以及心理社会因素（即，表示“自” 有效性、社会支持、障碍）以及健康信息。 本拟议研究中收集的数据和来自AICS的数据将 合并，允许纵向分析相同的主题，从 12-16岁（AICS基线）至25-29岁（拟定研究的最后一年）。 本研究的主要目的是：1）确定 从青春期到青年期的PA量，并评估 可能的性别和种族差异; 2）评估 从青春期到青年期的PA跟踪;以及3）评估 青年期PA的青少年预测因子。

Physical activity (PA) has been identified as a national priority area for promoting the health of the US population. While the health benefits of an active lifestyle are well documented in adults, the prevalence of inactivity in the US adult population remains high. It is widely believed that the prevention of physical activity in adults is best accomplished by establishing a physically active lifestyle during youth that will persist into adulthood. However, there is a paucity of data on the relationship between childhood and adult physical activity and no evidence that an active child becomes an active adult. The overall goal of this study is to examine the relationship between physical activity in adolescence and physical activity in young adulthood. This proposal is a follow-up study of 1245 young adults aged 21-25 years, who represent a biracial population-based cohort initially recruited in 1990 to participate in a NIH funded longitudinal study of the incidence and determinants of injury in adolescents, the Asolescent injury Control Study (AICS).The baseline age of the participants was 12- 16 years of age. Extensive physical activity data were collected during the four years of AICS. Physical activity will be assessed in the current study using a standardized questionnaire identical to that used in the adolescent study. Additional data to be collected include sociodemographic (i.e., education, marital status, occupation), lifestyle factors (i.e., cigarette and alcohol use), and psychosocial factors (i.e., self- efficacy, social support, barriers), as well as health information. Data collected in this proposed study and data from AICS will be combined, allowing for longitudinal analyses of the same subjects from ages 12-16 (AICS bseline) to ages 25-29 (final year of proposed study). The primary objectives of this study are to: 1) determine changes in the amount of PA from adolescence to young adulthood and to evaluate possible gender and racial differences; 2) evaluate the degree of tracking of PA from adolescence to young adulthood; and 3) evaluate adolescent predictors of PA in young adulthood.