Przydatność testu laboratoryjnego na bieżni mechanicznej do wyznaczania progu przemian anaerobowych u lekkoatletów trenujących biegi średnie

Barbara Sobańska, Rafał Pakuła, Kazimierz Szyszka

Streszczenie
The aim of the research was to determine the anaerobic threshold (PPA) on the level of lactic acid equaling 4 mmol x 1^-1 in short and medium distance runners.
The subjects of the research were twelve I, II and III sport-class athletes of age ranging from 19 to 24 years. The experiment was conducted twice in the preparatory period, with one-week interval.
In the first exercise the sportsmen were to perform a run on a motor driven treadmill. It was a run of raising speed, till exhaustion.
The speed of the run was increased every 3 minutes and between the particular series a one-minute interval was introduced, during which blood samples from ear lobe were collected in order to determine lactates concentration (enzymatic method).
After a one-week interval, the same athletes performed an analogous field test on the athlete stadium track. During both experiments the heart rate was recorded with the use of Sport-Testers PE 3000.
On the basis of the changes in lactates concentration, the PPA in both of the tests was determined as well as threshold speed (V_PPA) and the threshold values of heart rate (HR_PPA).
The (V_PPA) in the laboratory test was 3.83 x s^-1 and was a little lower than the one of the field run (4.18 x s^-1).
The heart rate on PPA level equalled 174 min^-1 in the treadmill run and 176 min^-1 in the field run. The differences in the thresholds values were statistically insignificant. The above experiment proves the possibility of employing a treadmill in determining PPA in athletes.

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