(1.School of Physical Education,Harbin Normal University,Harbin 150025,China;2.Department of Human Sports Science,Shenyang Sport University,Shenyang 110032,China) Abstract: Basing their study subject on the jumping move of a volleyball player to make a smash at the #4 position, by means of video shooting, synchronous sole pressure and myoelectricity testing coupled with constant speed test-ing, the authors accurately acquired the kinematical, dynamical and biological parameters shown in the process of a volleyball player jumping up for a smash, and revealed the following findings: in the process of a volleyball player jumping up, what was completed by the extensor groups of the lower limbs was a “cycle of extending and retract-ing” contraction, therefore the training for the capacity of super isometric power of the extensor groups of the lower limbs should be strengthened during the training; in the process of a volleyball player jumping up for a smash, the sole pressure showed a twin peak shape curve as the time changes, the characteristic of the sole pressure varying with the time is an important factor that affects the jumping result, therefore during the training attention should be paid to the training of the player’s quick jumping ability; the extensor groups of a volleyball player, such as the glu-teus maximus, quadriceps femoris and triceps surae, play an important role in the process of jumping up, therefore during the training attention should be showered on the training for the jumping ability of the extensor groups of the lower limbs; the test results of constant speed squatting down and up of the lower limb joints of volleyball players indicated that the working characteristics of the lower limb muscles are similar to those at the lift off stage of the jumping move, which hints that we can carry out dedicated lower limb power training for volleyball players by util-izing the advanced constant speed test and training system. Key words: sports biomechanics;jumping move for a smash;dedicated power;volleyball |