If we compare the background distribution of SCP in women athletes with a control group of healthy women of the same age who are not involved in sports, then statistically significant differences are observed in the right temporal region. In athletes, the value of SCP in this lead is significantly higher (10.1 + 1.4 mV) compared with the control group (4.2 + 2.0 mV), which indicates the presence of stress in athletes already before the load.
Under the influence of training, SCP in some leads significantly changed: in the frontal and central regions it increased, and the local potential in the right temporal region decreased. As in men, the magnitude of the averaged SCP did not significantly change .
Significant changes in SCP parameters after a training load in female athletes.
On the ordinate axis – changes in SCP after loading, the colored bars are the arithmetic mean, unpainted – the standard error.
Unlike men, in women, the local potentials in the frontal region under the influence of the load increased, interregional differences within the limits of one hemisphere increased , while the interhemispheric ones smoothed out. This, as well as an increase in SCP in other areas, indicates a greater increase in energy metabolism in the brain (greater stress), developing under the influence of a load in women than in men, which, judging by the biochemical parameters (change in lactate, pH in the blood, etc. .), was approximately the same in effect on the body. In women, the lactate content in the blood increased by 5.5 + 0.4; pH decreased by 0.24 + 0.01, the ratio of 2NH 3 / N increased by 2.68 + 0.26 times. However, the average value of PANO per 1 kg of body weight was lower for women than for men and amounted to 15.1 + 0.46 units. This indicated lower energy reserves of women compared to men. The PANO / kg indicator correlated with the work performed by the athletes per 1 kg of weight ( r = 0.51, p <0.05).
Women, like men, were divided into two groups depending on the size (less than or more than 10 mV) of the averaged SCP after exercise. The average SCP values were in the groups 3.1 + 1.4 and 18.3 + 1.2 mV, respectively. Similarly to the patterns revealed in men, women in these groups had significant differences in the value of ANSP, in the initial parameters of the SCP and in the response of the SCP to the load. In the group with a low SCP after loading, the initial values of the averaged SCP were also low (5.6 + 2.2 mV), and upon loading, they further decreased. In the group with high AMR after training, the initial AMR values were significantly higher (12.7 + 1.3 mV), and during exercise their increase was observed. PANO per 1 kg of body weight was significantly higher in the group with low average SCP values and amounted to 16.1 + 0.5 units compared to the group with high average SCP values in which the ANSP was 14.3 + 0. 6 units
Thus, in women, as well as in men, there is a connection between the increase in the constant potentials of the brain and the transition to anaerobic metabolism. With standard physical activity and low ANSP, acidification of blood flowing from the brain is more significant than peripheral blood, which is manifested in an increase in SCP. With a high ANSP and the same load, an inverse relationship is observed, and the soft starter tends to decrease. An increased risk of an increase in SCP during the training process is for those athletes who already have high SCP values before loading.
However, the reaction to the load in women is somewhat different from the similar reaction in men. Athletes have a lower anaebic threshold, which is obviously due to the characteristics of the pulmonary and cardiovascular systems. They have signs of stress even before the load: SCP is elevated in the right temporal region. Under load, positive changes occur in SCP, i.e., an increase in cerebral energy consumption is observed. Apparently, women in this sample are generally less prepared for the load compared to men.