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An antidote to teenage depression might be found in school gymnasiums and on sports fields, a major new review argues. Supervised exercise programs are associated with significant reductions in symptoms of depression among children and teenagers, according to the analysis of data from 21 studies involving more than 2,400 kids. “This is the first time that we’ve been able to put enough studies together so that we can make a pretty good conclusion to answer the question, ‘Is physical activity and exercise good for children with depressive symptoms?’” said co-study author Walter Thompson, a retired professor of exercise physiology with Georgia State University in Atlanta. “The answer is overwhelmingly yes.” Further, the data indicate a specific dose of exercise that will produce the biggest benefit in children: Around an hour of physical activity three days a week provided the best relief for symptoms of depression. “And you know, that’s pretty close to what the federal government has recommended as regular exercise for both children and adults, somewhere between 75 and 150 minutes a week,” Thompson said. The study also found that exercise programs shorter than 12 weeks produced greater benefits — possibly because such a tightly defined program allows participants a positive sense of achievement and accomplishment, according to an editorial co-authored by Eduardo Bustamante, an assistant professor of kinesiology and nutrition at the University… read on > read on >