The reason for the accelerated development of cancer sleep apnea (momentary cessation of pulmonary ventilation) during sleep, scientists called hypoxia — insufficient intake in any organ or tissue of oxygen. This provokes the formation in the tumor tissues of the blood vessels supplying the cancer cells with oxygen.

"Patients with obstructive sleep apnea (the harbinger of which is "mighty" snoring), usually at night suffer from intermittent hypoxia. We have shown that it has the potential for the formation of blood vessels inside tumors, which means to obtain a greater amount of nutrients," said co-author Antoni Vilaseca.

To such conclusions scientists have come, watching the mice (12 healthy and 12 with tumors of the kidneys). Patients mice which were exposed to intermittent hypoxia, the researchers noticed growth in the number of vascular progenitor cells.

Vilaseca noted that, most likely, the results obtained for mice are applicable to humans. Experts suggest that the access of oxygen to the tissues and organs in non, partial and sports-minded people can explain their lower cancer incidence.