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A pro athlete trained with tape over her mouth. You probably shouldn’t.
Some researchers believe nasal-only breathing can improve athletic performance. But the science is unclear.
Benefits of nasal breathing
There are several advantages to breathing through your nose.“It helps to filter warm and humidified air,” said Brett Comer, a professor of otolaryngology at the University of Kentucky. “It’s preparing the air that goes through the nose and preparing it to go down in the lungs.”
Breathing through the nose also releases nitric oxide. “If it comes out of the sinuses and then is taken down in the lungs, that can help to dilate blood vessels,” Comer said.
Some of those advantages are lost when we breathe through the mouth, experts say. George Dallam, a professor in exercise science at Colorado State University in Pueblo, compares breathing through your mouth to running a car without an air filter.
the experts are baffled...