title: Mental disorder prevention and physical activity in Iranian elderly.
abstract: OBJECTIVE
  Mental disorders such as depression, anxiety and dementia are common in elderly. However, physical activity is suggested to be effective in preventing such aging-related disorders. The aim of this study was to investigate the role of physical activity on mental health in later life.
  
  
  METHODS
  Four hundred elderly people were randomly divided into the intervention and control groups. The intervention consisted of exercise twice a week for two months. Mental health status before, just after, and three months after the study was assessed with the 28-item General Health Questionnaire (GHQ-28).
  
  
  RESULTS
  The mean of the GHQ-28 total scale decreased in the case group and this change remained significant after three months (before: 8 ± 5.5, after three months: 5.6 ± 4.6, p < .001). GHQ subscales including somatization, anxiety, social dysfunction, and depression decreased significantly in the case group just after and three months after the intervention.
  
  
  CONCLUSIONS
  Physical activity significantly prevents mental disorder in older adults. Although it has effects on anxiety, social dysfunction, and depression, the greatest influence is on improving the somatization symptoms.
authors: Department of Health Promotion and Education, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.
authors: Seyede Salehe
authors: SS
authors: Mortazavi
authors: Kazem
authors: K
authors: Mohammad
authors: Hassan Eftekhar
authors: HE
authors: Ardebili
authors: Reza Dorali
authors: RD
authors: Beni
authors: Maryam
authors: M
authors: Mahmoodi
authors: Ammar Hassanzadeh
authors: AH
authors: Keshteli