Abstrakt
The aim of this study was assess the changes of VT and energy cost of running (C) during the year in trained Czech soccers. On the treadmill we tested fourteen good trained Czech soccers (mean age = 21.5+/-3.4 years, height = 179.3+/-4.2 cm, body mass = 72.5+/-6.5 kg, body fat = 7.0+/-1.9%, VO2max.kg-1 = 66.3+/-4.0 ml.kg-1.min-1, vmax (5% inclination) = 17.5+/-0.7 km.h-1 - 4.86+/-0.19 m.s-1, LAmax = 11.7+/-1.7 mmol.l-1 - data from the 1 st evaluation).
The maximal functional variables were almost constant during the year, the maximal change in VO2max.kg-1 being about 4%. Similarly, oxygen uptake at the VT was almost constant.
Greater changes, about 5%, were recorded in the maximal velocity of running on the treadmill. Still greater alterations, about 6%, were determined in the velocity of running at the VT, at which the maximum was attained in the same time as maximum speed of running by exhaustion.
The greatest change, about 7%, during the training year was found in C. The main finding of the present study is that in trained soccers similarly as in others groups of trained athletes, the time needed to reach the maximum running speed and running speed at VT is longer than the time needed to reach the lowest values of C.