Biorhythmology is one of the youngest and most rapidly developing science of the XX century. It studies the cyclical biological processes occurring in a living organism. All living creatures have the ability rhythmic organization of physiological functions. This ability provides high perfection of adaptation to constantly changing conditions of the environment, including to the conditions of labour and sports activities, to perform hard-coordinated movements. In biorhythmology covers a wide range of issues related to biorhythms.