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Effects of Obesity on Lung Function

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Obesity and Lung Disease

Abstract

Obesity causes significant changes in lung function, many of which are secondary to the reduction in operating lung volume caused by a stiffening of the respiratory system. In addition, reductions in the volume of the intrathoracic cavity, due to the presence of adipose tissue and changes in other structures, may also contribute to an overall reduction in lung volume. Thus, the primary effects of obesity on lung function arise from the mechanical effects of adipose tissue on the respiratory system. However, some studies have reported changes in airway function associated with obesity that appear to be independent of lung volumes, though the causes of these abnormalities are unknown. It is unclear whether the mechanical effects of obesity on lung function can increase the risk of respiratory symptoms in otherwise healthy individuals. However, in respiratory disease, a reduction in operating lung volume may increase symptoms during bronchoconstriction in asthma and protect against symptoms during exercise in COPD.

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Correspondence to Cheryl M. Salome B.Sc., Ph.D. .

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Salome, C.M., King, G.G., Berend, N. (2013). Effects of Obesity on Lung Function. In: Dixon, A., Clerisme-Beaty, E. (eds) Obesity and Lung Disease. Respiratory Medicine, vol 19. Humana Press, Totowa, NJ. https://doi.org/10.1007/978-1-62703-053-3_1

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