Page 52 - IJSA, Vol. 3, No 1, 2020

International Journal of Science Annals, Vol. 3, No. 1, 2020

Table 2 presents the absolute values of the measurement test with the right hand in the initial state in OG 2, the
of SCS when performing the test with the right and left greatest slowdown of SCSl (P-value<0.05) was
hands at all stages of observation of athletes. The most observed among the studied groups. That is, a reduction
significant acceleration in the initial state (S1) of the SCS in the time of SCSl and SCSr prior to exercise may
when performing the test with the left (SCSl) and right predict an excessively sympathetic response to the
(SCSr) hands was in OG1 compared with СG and OG2 cardiovascular system.
(P-value<0.05). At the same time, when performing the

Table 2. Differences in switching rates of switching of central settings in highly skilled athletes under the influence of
intense training load and in the period of early recovery thereafter.

Control CG OG1 OG2
Parameter
point n=202 n=10 n=9
b
a
S1 1.62 (1.15; 2.42) 1.26 (0.96; 1.38) 1.90 (1.49; 2.20)
ac
SCS l S2 1.49 (1.07; 2.29) 0.96 (0.91; 1.82) 2.20 (1.38; 3.22) bca
cd
S3 1.67 (1.24; 2.35) 1.65 (1.24; 2.09) 2.45 (1.68; 3.11) abc
S1 1.62 (1.07; 3.08) 1.15 (0.85; 1.51) 1.82 (1.71; 2.12) abb
a
c
SCS r S2 1.57 (1.13; 3.36) 1.51 (1.24; 1.65) 1.38 (1.26; 1.46) abcc
cd
dc
S3 2.04 (1.21; 3.77) 1.95 (1.13; 2.28) 1.73 (1.13; 1.76) abcd

a
c
Note. – p<0.05, between OG1 and OG2 in comparison with CG; – p<0.05, –p<0.01, between OG1 and OG2; – p<0.05,
bb
b
cc d
– p<0.01, between S2 and S3 in comparison with S1; – p<0.05, between S2 and S3.

At S2, sufficiently characteristic changes are observed, slowdown is observed when performing the test with the
which indicate the absence of changes in the SCSl and left hand, in comparison with the initial state, and it does
SCSr indicators in СG, a significant acceleration of not differ from the state after exercises and is
SCSl (P-value<0.05) and a significant slowdown of significantly slower than in the OG (P-value<0.05) and
SCSr (P-value<0.05) in OG1, as well as a significant at sympathetic overstrain (P-value<0.05). On the other
slowdown of SCSl (P-value<0.05) and a significant hand, when performing the test with the right hand, the
acceleration of SCSr (P-value<0.01) in OG2. That is, SCSr has intermediate values between S1 and S2, which
after physical load a significant acceleration of the indicates the reverse tendency of the central processes of
accelerated SCSl in the initial state, which is sensorimotor regulation the next morning after training,
accompanied by a significant slowing of the accelerated which, at the same time, are significantly faster than in
SCSr in the initial state, can predict an excessively the OG (P-value<0.05) and at sympathetic overstrain (P-
sympathetic response of the cardiovascular system. On value<0.05).
the other hand, significant slowdown (within the That is, characteristic asymmetric changes at the central
regulatory limits) of the SCSl against the background of level of regulation of sensorimotor function are noted at
significant acceleration (within the regulatory limits) of sympathetic and parasympathetic overstrains of the
the SCSr can predict excessive parasympathetic cardiovascular system of athletes.
response of the cardiovascular system.
At S2, changes in SCS indices in СG indicate a Discussion
significant slowdown of SCSr (P-value<0.05) compared According to the results of the analysis of the data in the
to S1 and S2 with the invariance of SCSl; in OG1, SCSl initial state, before physical activity, rather informative
and SCSr indicators indicate a significant increase differences between the studied groups were revealed,
compared to S1 and S2 (P-value<0.05); in OG2, SCSl is which indicated a greater speed of the processes of
significantly different from S1 (P-value<0.05) but not S2, switching movements in the cortical motor areas of both
and SCSr is significantly less than S 1 (P-value <0.05) hemispheres in individuals who subsequently formed an
and significantly greater than S2 (P-value<0.05). That is, overreaction of the sympathetic division of the ANS,
characteristic of OG1 the next morning after training is which led to overstrain of the cardiovascular system.
the slowdown of the central level of regulation of An asymmetric functional response to intense physical
sensorimotor function in comparison with the baseline activity, characterized by significant acceleration of
level when performing tests with the right and left hands. central processes in the right hemisphere and significant
The OG2 is characterized by a slowdown of the central slowdown in the left, is different for sympathetic
level of regulation of the sensorimotor function overstrain. This information complements the data
compared to the baseline level when performing the test obtained by Fokin et al. (2009) in the study of the level
with the left hand and speeding up when performing the of constant potential of the brain, which indicate the
test with the right hand. greater importance of the right hemisphere in
In the development of overstrain of cardiovascular determining the effects of stress. It should also be
system at a sympathetic type, the slowdown of the SCS mentioned that, according to many scientists
with both the right and left hand is noted, as compared (Berdychevskaia et al., 2009; Noskin et al, 2005), the
to the initial state and the state after physical activity. In change of the dominant hemisphere occurs when the
this case, the SCS values do not differ in the OG. At the athlete’s performance is reduced. However, in this case
same time, at overstrain by parasympathetic type, the it is not possible to talk about it.

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