This article was produced and financed by University of Bergen

Menopause may cause decline in lung capacity, according to a new study. (Photo: Shutterstock)

Declining lung function in menopausal women

Menopausal women appear to experience a decline in lung function, comparable to smoking 20 cigarettes a day for 10 years.

University of Bergen

The University of Bergen is located in Bergen, Norway. Six faculties cover most of the traditional university disciplines. Within the faculties are included 60 different specialised departments, centres and institutes.

This is the new discoveries of researcher Kai Triebner at the Department of Clinical Science, University of Bergen (UiB), Norway.

Triebner and his team of researchers discovered that the decline in lung capacity was comparable to smoking 20 cigarettes a day for 10 years, and the decline in size was comparable to smoking 20 cigarettes a day for 2 years.

“The decline in lung function may cause an increase in shortness of breath, reduced work capacity and fatigue,” says Triebner.

The study was recently published American Journal of Respiratory and Critical Care Medicine.

Risk of reduced lung capacity

The researchers analyzed data from 1,438 women enrolled in the European Respiratory Health Survey.

Participants in the study ranged in age from 25 to 48 at enrollment, and none was menopausal when the study began. They were followed for 20 years and during that time most went through the menopausal transition or became postmenopausal.

In the study, European researchers report that both forced vital capacity (FVC), a measure of lung size, and forced expiratory volume in one second (FEV), a measure of how much air can be forcefully exhaled in one second, declined in women going through the menopausal transition and after menopause beyond what would be expected through normal aging.

The symptoms depend upon how much lung capacity is reduced, and a few women may develop severe symptoms as a result of this decline.

According to Triebner, the study highlights the importance of maintaining respiratory health long after the menopausal transition.

“Women are living longer and, therefore, many years beyond menopause,” he points out.

First study

In what seems to be the first longitudinal population-based study of lung function and menopause, the researcher discovered that current and past smokers showed a steeper decline in both age- and menopause-related lung function decline.

“There may be several possible explanations for these findings. Menopause brings hormonal changes that have been linked to systemic inflammation, which itself is associated with lung function decline.”

“Hormonal changes are also implicated in osteoporosis, which shortens the height of the chest vertebrae and may, in turn, limit the amount of air a person can inhale.

Need more awareness

Trieber underlines that women, and their physicians, should be aware that respiratory health might decline considerably during and after the menopausal transition.

“This could mean that they experience shortness of breath already with low physical activity,” says Triebner.

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