Clipping of news on Brazilian Culture, Law and Citizenship
10/09/2013
This article was translated by an automatic translation system, and was therefore not reviewed by people.
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Incidence of the disease would fall by 14% in women over 50 years
Intense exercise are more effective in preventing
Experts say this is further evidence that lifestyle influences the risk of developing cancer
Walk at least an hour a day can reduce risk of breast cancer by 14 % Photo : Marcia Foletto / O Globo
ATLANTA - A light walk an hour a day can have a big impact on the lives of women in post - menopause. Research of the American Cancer Society published in the journal " Cancer Epidemiology , Biomarkers & Prevention " pointed to walk seven hours per week can reduce the risk of breast cancer by 14% in the group of women between 50 and 74 years , where the incidence of the disease is increased.
The study surveyed 73,615,000 postmenopausal women selected by the organization between 1992 and 1993 , of which 4,760 were disgnosticadas with breast cancer during the 17 years they were kept under observation . According to the authors , this is the first study to directly link the benefits of walking to the prevention of disease .
- We were pleased to find that , without any other physical activity , we associate the walk an hour a day to a lower risk of developing breast cancer in these women - said Alpa Patel , senior epidemiologist at the American Cancer Society in Atlanta, Georgia , who led the study - Given that over 60 % of women reported walking an hour a day , to promote walking as a healthy leisure activity can be an effective tool to increase physical activity among postmenopausal women .
The participants completed a questionnaire with demographic , medical and environmental during registration . Between 1997 and 2009 , the questionnaire was repeated every two years to update the information . Women also reported the average number of hours spent on physical activities such as walking, running , swimming and cycling , among others , and the amount of hours spent sitting , including the time spent with television and reading.
The researchers calculated the total hours of metabolic equivalent ( MET , its acronym in English ) per week for each participant , which is the ratio of the energy expended during activity specific for the resting metabolic rate . About 9.2% of women did not perform any exercise , and approximately 47 % reported that walking was her only physical activity .
The study also found that participants who reported at least one hour of intense physical activity per day had a 25 % lower incidence of breast cancer compared to women who were less active . Among the participants who reported only walking as exercise, those who walked for seven hours or more per week had a 14 % lower risk of contracting the disease than those who walked for three hours or less .
- Current guidelines recommend that adults should strive to exercise at least 2.5 hours per week with moderate intensity or 75 minutes a week with intense aerobic activity to overall health - said Patel - Higher levels of activity can provide greatest benefit for the prevention of breast cancer .
According to estimates by the Institute for Health Metrics and Evaluation , one in 12 women , throughout life , will be diagnosed with breast cancer in Brazil . This type of cancer is the most affects women worldwide . In 2013 , we expect , for Brazil , 52,680 new cases of the disease , with an estimated risk of 52 cases per 100 000 women .
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This article was translated by an automatic translation system, and was therefore not reviewed by people.