THE INFLUENCE A TYPE OF LANDING AFTER A BLOCK HAS ON VALGUS KNEE LOADING OF FEMALE VOLLEYBALL PLAYERS

The aim of the study was to determine the association between stick, step-back, and run-back landings after a block and select risk factors of ACL injuries for female professional volleyball players. The research sample involved twenty female professional players of the Czech Extraleague. Two force plates were used to determine ground reaction forces. Eight infrared cameras were employed to collect the kinematic data. The one-factor repeated-measures analysis of variance, where the landing type is the factor, was used for comparing the internal adduction moment on the right lower limb. The highest internal adduction moment occurs during the run-back landing. This moment, however, did not have any effect within the first 100 ms after initial contact with the ground, but rather upon the subsequent motion carried out when stepping back off the net