By Nanci Hellmich, USA TODAYA third of U.S. adolescents are unfit, according to a landmark analysis of health data, and experts say it’s time to get them moving.Russell Pate, professor of exercise science at the University of South Carolina, and colleagues based their conclusion on the number of kids who wear out quickly on a basic treadmill test.The researchers also found that overweight teens are more likely to fail a cardiovascular fitness test than those at a normal weight, and males are slightly more likely to meet the fitness standard than females.The team examined data on 3,287 boys and girls, ages 12 to 19, taken from a large government survey…. Other findings published in October’s Archives of Pediatrics and Adolescent Medicine:• 28% of males and 38% of females, ages 18 and 19, did not meet the fitness standards.• 30% of males and 33% of females, ages 14 to 15, did not pass the tests.• The passing rates were no different between ethnic groups.”These data clearly call for us to redouble our efforts to provide kids with high-quality physical activity in a range of settings from sports to PE classes to recreation programs to home-based activity,” Pate says.Charlene Burgeson, executive director of the National Association for Sport & Physical Education, a group of physical education and sports professionals, says, “This study reinforces the importance of all youth being physically active, spending minimal time in sedentary activities such as TV watching, and maintaining a healthy weight.”As a society, it’s time to move past the need to prove that there is a problem and to find ways to actually create environments and a culture where these healthy behaviors are the norm,” Burgeson says.One-third of children and teens — about 25 million kids — are overweight or on the brink of becoming so, which increases their risk of developing diabetes, high cholesterol, high blood pressure and other illnesses, according to a government survey.