‘Sigh’ all you want: It’s a superpower

New research from ETH Zurich reveals that deep sighing offers a significant benefit to lung function. A deep breath helps to restore the ideal layering of lung fluid, reducing surface stress and making lungs more compliant. This physical explanation underlies the feeling of relief experienced after a deep sigh. There is definitely a physical explanation for why you feel a relief after a deep sigh. The explanation starts from realizing that the thin film formed by the lung fluid on the surface of the lungs actually consists of several layers.