JOURNAL OF SPORT SCIENCES

The purpose of the study was to identify the relationship between the unstable equilibrium and the
electrical activity of the thigh muscles of football players as a function of qualitative training. The
researcher used the descriptive method to suit the nature of this study, the research sample was
chosen by deliberate method of football players for the youth level and the number of (10) players
participated in the study. Foot balance and pressure measurement and electrical activity of muscles
were measure in the laboratory of motor behavior and laboratory of biomechanics - College of
Sports Science and physical activity - King Saud University by TECNOBODY and Electromyography
device, the most important results outweigh the unstable equilibrium or For the research sample,
there was a positive correlation with the degree of unstable anterior and posterior equilibrium and the
Maximum Voluntary Contraction (MVC) of the posterior femoral muscle of the (Kick) Biceps femoris

The research included four chapters:
Chapter 1: - Mental stimulants are specific cognitive means that stimulate the
memory of the learner and urges them and employ the appropriate mental
processes while learning or leave him the freedom to employ what he wants
mental processes that lead to understanding and absorption and then learning,
artistic yoga is integrated yoga (body and mind) And spirit),
The trainee will not be bored because the exercises are accompanied by music
and will not hinder people's concentration. The importance of research is to
know how the use of yoga and psychotropic exercises affects the accuracy of
some of the basic volleyball skills of the players and that not all sports teams
lack the use of yoga exercises Which have great benefits on the psychological
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and physical levels of individual or individual games and who need such
exercises for their multiple benefits.
So the researchers decided to use yoga exercises and psychotropic drugs to
accurately perform some basic beach volleyball skills. The aim of the research
is to identify the effect of using yoga and steroids on the accuracy of some
basic beach volleyball skills. The researchers hypothesized that there are
statistically significant differences between the tests of the two experimental
groups in the accuracy of performance of some basic skills of beach volleyball.
The human field included beach volleyball players for young people. The
research was conducted from 13/3/2017 until 12/8/2018 in the private
gymnasium of each club.
Chapter II: - This chapter includes the methodology of the research and its
field procedures. The researcher used the experimental method to suit the
nature of the research problem. The sample of the research was chosen by
road, namely, beach volleyball players for youth for the following clubs (Central
Filters, Civil Defense, ). The tools and methods used in the research as well as
the tests used were mentioned and the scientific conditions for the tests were
extracted after the experimental and tribal experiments were carried out and
then the tests were performed and the results were processed statistically.
Chapter III: - Here the statistical results were presented in tables with an
analysis of these results and discussed
Chapter IV: - This chapter contains a set of conclusions, including that the
exercises used in yoga well affect the results of accuracy of beach volleyball
players of the skills of the wall of the wall and beating overwhelming. Mental
stimulants have a good impact on the accuracy of the beach volleyball players
of the wall of the wall and the beating. The researcher recommended the need
to adopt yoga exercises in the training programs for beach volleyball players.
The need to adopt psychotropic drugs in the training programs for beach
volleyball players

The present study consisted of five chapters. The first chapter is an
introduction that discussed the artistic and legal developments in gymnastics as
well as the role of psychological variables and structural indicators that are
regarded as a critical element in many sports games. The study aims at:
Investigating the participation of performing front hand jump on the vault in
terms of the most important structural indicators: construction, level of
ambition, and physical self among the students of the third stage in men's
artistic gymnastics.
The third chapter included the study methodology and field procedures. The
descriptive methodology was adopted on a sample of 60 students from the
third stage in the University of Diyala College of Physical Education and Sport
Science.
Section Four
The results of the predictive value of the performance of the forward jump on
the jumping platform, as well as the statistical description of the variables
through the extraction of the arithmetic mean, the mean, the standard
deviation, the torsion coefficient, the correlation between the variables and
the results of the correlation coefficient, the input ratio, the standard error of
the estimation, Linear and static reduction and impact ratio and analysis, and
then discuss these results.
The study concluded that:
There is a significant correlation between some structural indicators and the
artistic performance of front hand jump on the vault which include: height,
weight, and physique.
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There is a rate of participation in some structural indicators and ambition to
the skill performance.
The other variables of research (structural - structural indicators) showed
random links with the skill performance of the jump of the front hands on the
jump platform (arm length, trunk length, lower limb length, chest
circumference)
weak performance of the skill of the research sample in general led to the
emergence of random links between some of the structural - structural
indicators with the jump of the front hands on the jumping platform.
Weak performance of the research sample in general led to a weak
contribution ratio between physical self-measurement and skill performance.
The recommendations were
The necessity of emphasizing the structural - structural indicators chosen for
their importance in the skill performance in the game of the gymnastic.

The concept of psychological strength endurance is one of the important
psychological concepts in all sports. . As well as goalkeepers are
subjected to pressure in training and competitions lead to their attrition
physically and this in turn leads to the attrition of psychological large,
Vice versa . Despite this, few players are able to survive beyond the
physical breakdown stage, and have the psychological stamina that is
attributed to the strength of their will. This shows the importance of
research through the effective and influential role of the psychological
endurance of the players of some games goalkeepers football as one of
the psychological variables that the goalkeeper specializes in his
interactive relationship with the sporting environment, as the guards vary
in the extent of their ability to withstand training pressures and
competitions and adapt to them Therefore, it was important to measure
the psychological stamina of the goalkeepers in football. They can deal
with the pressures of training and competitions positively and help them
maintain their psychological balance and achieve sports achievements
and set goals. The aim of the research is to identify the relationship

between psychological endurance and the performance of some of the
basic skills of the guards of Mesopotamia