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TUESDAY, July 2 (HealthDay News) -- Adults who were in good physical shape at age 18 were less likely to commit suicide than those who were less fit when they were younger, a new study has found.
Researchers analyzed data from 1.1 million Swedish men born between 1950 and 1987 and underwent a medical exam for military service. The men were followed into adulthood.
"Being in poor physical shape at 18 years of age, measured as the test results on an exercise bike during their medical exam for compulsory military service, can be linked to a risk of suicidal behavior as an adult that is 1.8 times greater," study co-leader Margda Waern, of the University of Gothenburg in Sweden, said in a university news release.
"But even when we exclude individuals who suffer from severe depression in connection with suicide or attempted suicide, the link between poor physical shape and an increased risk of suicidal behavior remains," Waern said.
Depression is a strong predictor of suicidal behavior in later life, but the situation among younger people is complex, and many factors are involved, the researchers said.
"One theory is that the brain becomes more resistant to different types of stress if you are physically active," study co-leader Maria Aberg, also of the University of Gothenburg, said in the news release.
Physical exercise should be considered in suicide prevention efforts aimed at young people, the researchers said. This study, however, found merely an association between physical fitness and suicide, not a cause-and-effect link.
-- Robert Preidt
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