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A number of studies showed association of mental status with heart ratevariability. This work discovered a feature of frequency structure of heartrate variability that is associated with mental readiness. In three independentgroups of 64, 39, and 19 volunteers by the factor analysis of heart rateperiodograms, it has been discovered that there are at least two other heartrate oscillation phenomena apart from the well known low frequency oscillationsand respiratory arrhythmia. They have periods of 3 and 4 heart beats.Association of amplitude of 3-beats oscillation with level of mental readinesswas shown due to further observation in two independent groups of 12 and 7.Moreover, possibility of assessment of mental readiness by the mathematicalmodel based on heart rate periodogram was suggested.

Mobilisation readiness state and the frequency structure of heart rate variability