Impact Of Physical Activity On Quality Of Life In Middle-aged Women: A Population Based Study [impacto Da Atividade Física Na Qualidade De Vida De Mulheres De Meia Idade: Estudo De Base Populacional]

PURPOSE: To evaluate the influence of physical activity on the quality of life of middle-aged women. METHODS: A population-based cross-sectional study was conducted on 370 women aged 40 to 65 years-old recruited from a population-based sample. Enrollment took place in Basic Health Units in each health district of the city (North, South, East, and West) from June to September 2011. According to the Municipal Health Department of the City, 20,801 women were assisted at the Basic Health Units during a one-year period. The sample size calculation was stratified by district and based on a 95% confidence level with a power of 80%, as well as an error estimate of 5% and it was considered proportional to the number of patients classified as having adequate quality of life (indicator ≥26) in the general population. Data were collected while women waited for their routine appointment at the Health Unit. WHOQOL-Breif was used to evaluate the quality of life, and menopause rating scale (MRS) was used to determine climacteric symptoms. The level of physical activity was assessed by means of the International Physical Activity Questionnaire (IPAQ). To obtain the classification of PA levels, we used three categories: sedentary, moderately active, and very active. Statistical analysis was performed using the Minitab software, version 16. RESULTS: The mean age of the subjects was 49.8 years-old (±8.1) and they were predominantly Caucasian (72.7%), married (61.6%), non-smokers (93.5%), and had High School education (47.8%). Using the WHOQOL, mean scores were found to be significantly different between the groups (low, moderate, and vigorous physical activity), classified according to the domains of quality of life (p<0.01). Concerning physical activity and climacteric symptoms, significant differences were found for all domains: psychological (p<0.01), vegetative-somatic (p<0.01), and urogenital (p