Study reviewed by XPT Assistant Performance Director, Mark Roberts
Original Study: http://bit.ly/2HQ5Rax
In this study they look at the relationship between nasal resistance and A) hypercapnia (describes a higher presence of CO2 in the body) B) exercise. Showing a linear decrease in nasal airway resistance as both exercise and CO2 levels increase. What this means is that respiratory efficiency increases as the demand increases as well as decreasing the amount of work the overall respiratory system has to do at high ventilation rates.
The researchers took 10 healthy volunteers, using a posterior mask rhinomanometry to measure the subsequent resistance in the following tests, EXERCISE – volunteers peddled on a stationary bike at 3 varied loads. HYPERCAPNIA – this was measured by supplying 3 different O2/CO2 mixtures, those being; 5% CO2, 6% CO2 and 8% CO2. resistance was measured during the expiratory breath only due to a potential for nasal collapse/flare during inspiration
What can we take away?
Read the original study: HERE