Performing cyclical breathing with exhale holds when feeling early symptoms of illness may prevent full-blown sickness.

“Anecdotally, I can say that I've had instances where I've felt a throat tickle coming on or some sinus infection, I will do the cyclic breathing that I described before. 25, 30 breasts exhale hold, 25 30 breasts exhale hold, 25, 30 breaths exhale hold, and then big inhale hold. And most times I didn't get full blown sick, but I also take other precautionary measures to get sleep, et cetera.”