![]() ![]() This report is based on data from the 1999-2002 NHANES. Mexican American and black individuals, adolescents aged 12 to 19 years, persons 60 years and older, low-income white individuals, and pregnant women were oversampled in 1999-2002 to allow for more precise estimates for these groups. 20 Since 1999, a nationally representative sample has been selected annually using a stratified multistage probability cluster sample design. The surveys are conducted by the National Center for Health Statistics of the Centers for Disease Control and Prevention. The NHANES is designed to monitor the health and nutritional status of the US civilian, noninstitutionalized population. Associations between cardiorespiratory fitness and demographic characteristics will be reported as well as associations with select self-reported physical activity behaviors. The purpose of this article is to present findings of NHANES for youth between ages 12 and 19 years. 19 Between 19, the National Health and Nutrition Examination Surveys (NHANES) included a measure of cardiorespiratory fitness, which was administered to participants between ages 12 and 49 years. A key component of overall physical fitness is cardiorespiratory endurance. 18, 19 If contemporary American youth are fatter and less active than previous generations, it is possible that physical fitness has also declined in this population. Obesity rates in US children and adolescents have increased dramatically since the 1980s, 16, 17 and it seems likely that decreased physical activity is a major factor explaining that trend. 10, 12, -1970 Health Examination Survey Cycle III included a treadmill exercise test for 12- to 17-year-olds to measure cardiorespiratory fitness. 12, 13 Both the National Children and Youth Fitness Study and the various President's Council on Physical Fitness and Sports surveys used field measures of physical fitness. 10, 11 Also, in the 1980s, the National Children and Youth Fitness Study was conducted under the auspices of the US Department of Health and Human Services. 10 During each of those 4 decades, the President's Council on Physical Fitness and Sports sponsored national surveys of youth physical fitness. 8, 9īetween the 1950s and the 1980s, surveys of physical fitness were conducted regularly in the US population of children and adolescents. ![]() Attainment of fitness standards is a common prerequisite for entry into occupations such as law enforcement, firefighting, the military, and many other jobs that involve physically demanding labor. 7 Also, higher levels of fitness support participation in sports and other physically demanding leisure activities. In children and adolescents, cardiorespiratory fitness is inversely associated with physiologic risk factors for chronic disease including high blood pressure, 1 hyperinsulinemia, 2 fat mass, 3 atherogenic lipid profile, 4 insulin resistance, 5 hemostatic and inflammatory markers, 6 and clustering of metabolic risk factors. Youth who have low levels of physical activity and high levels of sedentary behavior are also more likely to have lower cardiorespiratory fitness. Approximately one third of both males and females failed to meet recommended standards for cardiorespiratory fitness.Ĭonclusions In US youth, cardiorespiratory fitness is lower in males and females who are overweight than in those of normal weight, but fitness is not related to race/ethnicity. For both males and females, those in the normal weight group had higher fitness levels than those in the at risk for overweight and overweight groups. Among males, older participants had higher V̇O 2max values, while in females, younger participants had higher values. min −1) was higher in males (mean ± SE, 46.4 ± 0.4) than in females (mean ± SE, 38.7 ± 0.3) but did not differ across race/ethnicity groups.Main Outcome Measure Estimated maximal oxygen uptake (V̇O 2max) determined by a submaximal treadmill exercise test. Main Exposures Age, sex, race/ethnicity, weight status, self-reported physical activity, and television viewing. The National Center for Health Statistics conducted the survey. Participants A representative sample of 4732 youth aged 12 to 19 years was examined 3287 completed the treadmill test and were included in the analysis. Setting The National Health and Nutrition Examination Survey's mobile examination center, throughout the United States from 1999-2002. Objectives To assess cardiorespiratory fitness levels in youth aged 12 to 19 years and to examine associations between fitness and age, sex, race/ethnicity, and self-reported physical activity in this age group. Shared Decision Making and Communication.Scientific Discovery and the Future of Medicine.Health Care Economics, Insurance, Payment.Clinical Implications of Basic Neuroscience. ![]()
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