APPLIED
EXERCISE PHYSIOLOGYRELATION
BETWEEN VO2max AND SOME
BIOCHEMICAL PARAMETERS DURING THE TRAINING PROCESS OF
PREFESSIONAL SOCCER PLAYERS
Handziski
Zoran,
Dalip Metin, Handziska Eli, Nikolik Slobodan
Center of Sports
Medicine and Exercise Science „Kineticus”,
Institute of Physiology, Medical Faculty, Skopje, Republic of
Macedonia
INTRODUCTION. The football game
is a type of high intensity, intermittent type of physical loading by
activating all metabolic ways of energy production. The
supercompensation of the organ systems is a desired aim, including of
the increasing of VO2max. On the other side, some biochemical
parameters, as creatine kinase (CK), free radicals (FR) and potassium
ions (K+ ), are mentioned in the literature as the indicators of
adaptation or disadaptation of the training process in soccer.
The
aim of this study is to evaluate the relation between VO2max (dependent
variable) and some biochemical parameters (independent variables) in
process of evaluation of the effects of training process of
professional soccer players.
MATERIALS AND METHODS. This study
included 30 professional football players from one of the teams of the
first football league. The investigations were made at three points: in
the beginning of the preparation period, after the preparation period,
and after competition period. Each of the investigations was performed
in three phases. The following parameters had been determined: indirect
VO2 max (ml/kg/min) during a maximal treadmill test; before and after
maximal treadmill test, plasma concentrations of CK, FR and K+ by DEROM
method; responses of plasma concentrations of CK, FR and K+ as
differences of their concentration before and after maximal treadmill
test.
RESULTS. There were the significant changes of VO2max
during the training process of soccer players, an increasing after the
preparation phase and a decreasing at the end of the phase of
competition. At the same time, there were the significant changes of
biochemical parameters: an increasing of plasma concentration of FR and
K+ on the one side, and a decreasing of plasma concentration of CK, on
the other side, at the end of phase of competition. Only the decreasing
of the CK plasma response after the maximal treadmill test, after the
preparation phase, showed a significant negative influence on VO2max.
CONCLUSIONS.
The increase of VO2max after the phase of preparation, as a positive
effect of training process, was connected with a decrease of CK plasma
response on maximal treadmill test, maybe as a result of an adaptation
of muscle cell membrane on increased volume of training in the phase of
preparation. Taking account the decrease of VO2max at the and of phase
of competition, together with the decrease of plasma CK and CK plasma
response on maximal treadmill test, on the one side, and increase of
plasma FR and K+ and their responses, on other side, it was indicated
that there were some signs of fatigue and disadaptation at the end of
the phase of competition.
KEI WORDS: soccer,
VO2max, creatine
kinase, free radicals, potassium.
