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Proximity to nature may alleviate PMS symptoms, suggests a study

10:11 AM Dec 05, 2021 | ANI

Barcelona (Spain): According to a new study by the Barcelona Institute for Global Health (ISGlobal), women living near green spaces in their neighbourhood are less likely to experience the symptoms of premenstrual syndrome (PMS).

The research has been published in the 'Environment International Journal'.

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PMS causes clinically relevant psychological and physical symptoms in up to 20 per cent of women of reproductive age. Although a growing body of scientific evidence has shown that natural environments are associated with general and reproductive health benefits, there had not previously been any studies analysing the relationship between green space and PMS.

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The new study set out to determine whether living near urban green space could have a beneficial effect against PMS symptoms and whether this association was mediated by body mass index (BMI), air pollution or physical activity.

The study used data collected from more than 1,000 women between 18 and 49 years of age from the cities of Bergen (Norway), Gothenburg, Umea and Uppsala (Sweden) participating in the European RHINESSA cohort. The women completed a questionnaire on lifestyle factors, physical activity and reproductive health, indicating whether they experienced any of eight common symptoms of PMS: irritability, anxiety, tearfulness or increased sensitivity, depression, difficulty in sleeping, abdominal pain, breast tenderness or abdominal bloating, and headaches.

The study used the Normalised Difference Vegetation Index (NDVI) as a proxy for green space in the vicinity of the participants' homes. BMI was also analysed and residential exposure to air pollution--nitrogen dioxide (NO2) and particulate matter (PM2.5 and PM10)--was estimated.

The study found that women living in neighbourhoods with more green space had fewer symptoms of PMS and were less likely to experience four of the eight symptoms investigated: anxiety, depression, difficulty sleeping, and breast tenderness or abdominal bloating.

"When we looked at exposure to green space at a specific point in time, the analysis did not yield any significant results," commented ISGlobal researcher Payam Dadvand, co-coordinator of the study.

"Our research, therefore, underscores the importance of long-term exposure to green space, which is where benefits against PMS symptoms were found," Payam added.

"Three of the four symptoms that improved with exposure to green space were psychological, which is consistent with what we already knew: contact with nature helps to reduce stress and improve mental health," explained lead author Kai Triebner, a researcher at the University of Bergen.

"Stress can worsen PMS symptoms and increase levels of the hormone cortisol, which, in turn, could be associated with an increased release of progesterone, which has been linked to the occurrence of PMS symptoms," he added.

Previous research had suggested that the benefits of natural spaces are ]associated with increased physical activity and decreased exposure to air pollution, but this new study did not find a mediatory role for either of these factors.

"More and more studies have shown that green space is beneficial to our health," noted Payam.

"However, in many cities, we don't have enough of it, or it is not close to where the population lives. City officials should therefore prioritise natural environments as essential for our health," Payam concluded.

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