Definition: In this task, you are given a text of many news articles seperated by special token "|||||". Your task is to summarize them.
Input: Physical Fitness Helps Young Adolescents Prevent Depression (Photo : Reuters) 
  
 Young adolescents can ward off depression by staying physically fit, especially the middle-school girls, a new study reveals. 
  
 The researchers at the University of North Texas conducted a survey on 437 students from six middle schools in a metropolitan county in North Texas. Out of the total, 55 percent were girls. Based on the survey, they found that physically-fit sixth-graders were less likely to report feeling depressed on being promoted to the seventh grade. 
  
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 As part of the study, the participants were made to answer questions pertaining to symptoms of depression and fitness. Each of them was weighed and completed a shuttle-based run. This is a fitness testing procedure that involves short bursts of speed. The participants included 89 percent whites, 9 percent African-Americans and 27 percent Hisapnics. 
  
 "A student's physical activity level may change from week to week, whereas fitness is a result of more prolonged physical activity," said Camilo Ruggero, PhD, of the University of North Texas. "Assessing the students' body mass index, how well they performed on a shuttle-run test and their own feelings of personal fitness helps to give us a more complete picture of each student's fitness level." 
  
 The researchers noticed that 28 percent of the girls in sixth grade and 29 percent in seventh grade exhibited elevated symptoms of depression. Among boys, 22 percent faced high symptoms of depression in the seventh grade and 19 percent in the eighth grade. Among both girls and boys, the powerful predictor of depression in the seventh grade was having had symptoms of depression in the sixth grade. They found that fitness was a key factor in controlling depression a year later. 
  
 After considering existing symptoms of depression and weight, sixth graders who did well on cardio-respiratory fitness tests were less likely to feel depressed when they surveyed the seventh grade. 
  
 "Depression that begins at this time can lead to chronic or recurring depression in later years," he said. "Fitness programs are one way to help prevent depression in middle-schoolers, but schools should also use other interventions, such as one-on-one or group therapy, that more directly address symptom treatment among depressed adolescents." 
  
 The study was presented at the American Psychological Association's 122nd Annual Convention. ||||| By Tara Haelle 
  
 HealthDay Reporter 
  
 THURSDAY, Aug. 7, 2014 (HealthDay News) -- The more fit middle-school girls are, the less likely they may be to develop symptoms of depression, according to a recent study. 
  
 Although the effect of fitness on depression was small, improvements in fitness may be part of an overall strategy for reducing the risk of depression in middle-schoolers, according to Camilo Ruggero, lead researcher and an assistant professor of psychology at the University of North Texas. Other strategies might include school-based or family therapy, which can both treat and help prevent depression in at-risk kids. 
  
 "Fitness is not a cure-all, but it's a small piece of a larger problem," said Ruggero. He noted that depression is also linked to a higher body mass index (BMI), a measurement used to assess if a person has a healthy weight for their height. In addition, middle school is a time when fitness levels drop off, weight increases and depression increases. "That's why we're so focused on that period," he said. 
  
 "We don't know exactly why there is a link [between fitness levels and depression], but it is probably a number of things," Ruggero said. "It might be better self-esteem, healthier weight or getting more positive reinforcements that go along with being active, and/or it could be more biological. We know certain proteins and hormones associated with less depression respond to increased exercise." 
  
 He said the relationship might be reciprocal, too: the researchers also found that depression among sixth-grade boys predicted poorer fitness in seventh grade. 
  
 There was also a trend between fitness levels and depression in boys but it was not statistically significant. Less depression occurs among boys in general, so the effect may have been harder to detect, according to Ruggero. He suspects a study using a larger number of boys might show a stronger link, though it would likely still be modest. 
  
 The findings were presented Thursday at the annual meeting of the American Psychological Association in Washington, D.C. Findings presented at meetings are generally considered preliminary until they've been published in a peer-reviewed journal. |||||
Output:
The more fit a child is, the less likely he or she is to suffer from depression, a new study suggests. That's especially true for girls, according to researchers from the University of North Texas, who found a link among middle schoolers. The findings, which have yet to appear in a peer-reviewed journal, came after researchers analyzed the fitness levels of 437 sixth-graders. Overall, those with better fitness were less likely to report symptoms of depression when they entered seventh grade, notes Science World Report. It may have to do with "better self-esteem, healthier weight, or getting more positive reinforcements that go along with being active," the lead researcher tells WebMD. However, "it could be more biological. We know certain proteins and hormones associated with less depression respond to increased exercise." Zeroing in on the issue is important, though, because depression at that age can lead to chronic problems later in life. Researchers see it as one more piece of the puzzle for overall mental health in kids and suggest that school fitness programs could be key. (Meanwhile, a study finds depression can take years off your life.)