[EMG characteristics of women in respect with phase of the menstrual cycle, season and type of vegetative regulation].

Here we report on the electromyographic (EMG) characteristics of young females (n = 23, 19.9 +/- 1.4 years) under varied environmental and physical conditions: 4 phases of menstrual cycle phase (early and late follicular, ovulation, and luteal), spring and autumn seasons, and type of the vegetative nervous system (VNS) regulation based on the linear and novel non-linear parameters of interference EMG (iEMG) in m. biceps br. Additionally, we characterize activity of motor units of m. triceps br. The major finding was that most of the variables of iEMG and MU activity significantly decreased in the ovulation phase in the spring season. Among types of VNS regulation, the vagotonic type exerted influence on the neuromuscular status of young women.