Weight gain associated with accelerated lung function decline in adulthood

https://www.eurekalert.org/pub_releases/2020-02/bifg-wga022020.php

News Release 24-Feb-2020
Barcelona Institute for Global Health (ISGlobal)

Lung function declines naturally over the course of the human lifespan. However, this decline is steeper in individuals who experience moderate or high weight gain. This was the conclusion of a new study led by the Barcelona Institute for Global Health (ISGlobal), a centre supported by "la Caixa", which analysed the effect of weight changes on respiratory health over a 20-year period.

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Two mechanisms could explain the association between weight gain and pulmonary health. First, weight gain can affect lung function through mechanical effects. "Abdominal and thoracic fat mass is likely to limit the room for lung expansion during inspiration," commented ISGlobal researcher Gabriela Prado Peralta, lead author of the study. Second, weight gain can impair lung function through inflammatory processes, since adipose tissue--the area where fat accumulates--is a source of inflammatory substances that can damage lung tissue and reduce airway diameter.

Maintaining good lung function during adulthood is crucial to prevent chronic respiratory diseases, which nowadays represent a serious public health problem around the world. "Given the epidemic levels of overweight and obesity that we are currently seeing, it is fundamental to understand the effects of weight changes on lung function, which is a powerful predictor of morbidity and mortality in the general population," commented Garcia Aymerich. "The good news is that the negative pulmonary health effects of excess weight and obesity can be reversed through weight loss. Therefore, public health policies that promote healthy lifestyles can be the key to achieving good pulmonary health."

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