Abstract
The aim of this research was, within the scope of training with appliance of additional inertial load, to generate changes in motor performance of maximal running velocity as well as to confirm in observed variables adaptive processes for which it is supposed that they significantly influence on maximal running velocity. The experiment with parallel groups was realized whereby the acting of experimental factor (inertial load) was in two levels. The first, control group K realized the designed sprint training freely, in other words it did not apply additional load. The second, experimental group E-R ran with load fasten on their hands, and the third experimental group E-N with the load on their legs. The research contains initial and final measurement variables of acceleration and maximal running velocity (VTF1 i VTF2) in running at maximal sprint of 50m. Also, variables force and normalized force were observed -coefficient force extensor in knee-joint (k-EKOL), coefficient of heels force-(k-PFST), level of force extensor in knee-joint reached in 100 milliseconds (F100ms- EKOL), level force of flexors reached in 100ms (F100ms-PFST), extensors in knee-joint (EKOL/r), heels flexors (PFST/r). The applied training treatment is on the level of statistical significance(p<0.05), influenced on force development of applicant, because small load was applied with maximal velocity performance. It came to significant change in level of velocity of force development variables extensor of knee (k-EKOL) and heels flexors (F100msPFST) within the group with load on legs E-N and control group K. Simultaneously, in each group is significantly enlarged force of extensors and flexors. Velocity of running increased with E-R in the phase of acceleration. Due to connection of maximal running velocity and force variables through force influence, it can be possible to influence on maximal running velocity. Using experimental factor in training for force development with small loads and maximal running velocity, increased the level of force and the result of such work is increased force in areas of lower loads during higher velocity performance. The variables of muscle force can be seen as a predictor when maximal running velocity is in question since there is connection with running velocity. The domination of maximal force variables in phase of acceleration is shown, while the influence of velocity of force development variables (RFD) remains disputable in maximal running velocity phase.