Maximal intermittent exercise - The limitations of performance; Comparison the trained and untrained subjects

The purpose of this study was to investigate during repeated short, high-intensity exercise (1) what limitations makes the repetitions of this exercise difficult, (2) does specialist training consisting mainly anaerobic elements decreased these limitations. Two groups of subjects (n=22) -untrained group and trained one performed three-time repeated 30 s Wingate Test with 7- min rest after each bout of exercise. This work was supramaximal -intensity because average power output during first second of 30 s test was approximately two-three times higher than that required to elicit maximum oxygen uptake. Our result has shown that about 15% and 67% of total work in both groups was performed at the cost of phosphagens and glycogenolytic yielded ATP, respectively. Three times repeated exercise resulted in the decline of values of peak power output in 5.3% and 6.8% in control group and 6.2% and 8.4% in trained group during the second and third repetitions of exercise bout, respectively. Also the amount of mean power during repetitions of exercise bout declined, but the changes were more pronounced in the control group. The recovery rate of the mean power compared to peak power was slower in the control group than the trained one. After seven minutes of recovery peak power was recovered, to 94.7% and 93.2% and means power to 92.7% and 88.6% in second and third repetition of exercise bouts. The recovery rate of mean power in the trained group was faster probably due to the training-changes in sensitivity of glycogenolysis to the inhibitory effect of acidification or/and another negative factors. Based in our results we can suggest no changes in phosphagenic system caused by training containing mainly an anaerobic programme.