No. 52: Jul-Aug 1987
"Renewed discussion of a nasal breathing cycle, first discovered 5000 years ago, has recently been documented in the November 1986 issue of American Health by David Shannahoff-Khalsa of the Khalsa Foundation for Medical Science. Apparently the yogis of ancient India were the first to notice that breathing is dominated by either the right or left nostril for short cycle spans of one to three hours. (Cycles of this duration are known as ultradian rhythms, and are common to many biological functions.) By simply placing a mirror under your nostrils and watching for the larger amount of condensation, one can determine which nostril is in use.
"What are the ramifications of this seemingly insignificant phenomenon? The yogis reportedly have said that improved sleeping, more satisfying sex, enhanced digestion, and appropriate thought patterns were controlled by the use of a certain nostril."
It is further maintained that one can force a change in nostril breathing through meditation. In this way, it is possible to enhance sleeping, sex, digestion, and mental acuity! (LeBow, Howard A.; "Have You Heard about This One?" Cycles, 37:191, 1986.)
Comment. All we know is what we read in the journals! The next time you feel down, think about your breathing, or try a little cotton.