Functional Variables and Enzyme (CPK)to Skill of The main and Alternatives Players in Football (comparative study)

Abstract

Football is a type of sport that attracts people’s attention. So, it is necessary to look for everything that
can improve its reality and develop it. The importance of this research paper is to have a look on the
impact of competitions on functional devices, enzyme (CPK), aspects and the skills for the main players and
compared with the substituted players in football. The study aims at identifying the level of some functional
variables, enzyme (CPK) and the skills for key players and substituted players in football; identifying the
differences in some functional variables, enzyme (CPK) and the skills of the key and substituted players
in football. Descriptive method is used by researchers in a comparative way to solve the problem of the
study. The number of sample is fifteen players distributed to two groups, the first group is the key players
[9] and the second group is substituted players [6]. Also, the researchers used the SPSS statistical system
to extract the results of the tests. The most important conclusions are: (1) competitions play an active role
in developing the performance level, whether at the functional level or enzyme CPK or skills. (2) The role
of CPK enzyme has increased after performing high physical effort and for a long time for the key players
as a result of competition effort. Moreover, the following is the most important recommendations that the
study has reached into: (1)It is necessary to participate all players in the competition, even periodically, so
that substituted player can sense the atmosphere of competition and his active role in the development of
functional and skills of the player .