The testing program consisted of a standing jump, a countermovement jump, a 15-second rebound jump test, a standing jump with a 20-kg load, and a standing jump with a load corresponding to one-half of the subject's body weight. Patient and control groups (12 players in each) were selected from a population of 141 well-trained male Norwegian volleyball players, of which 55 (39%) satisfied the diagnostic criteria for jumper's knee. The higher the level of the team, the tighter the collective cooperation.The aim of the present study was to characterize the performance ability of the leg extensor apparatus in a group of athletes with jumper's knee and to compare the results with those of a matched control group without knee symptoms. Without strict collective cooperation, no matter how good individual skills are, it is difficult to play, let alone play the role of tactics. Strict collective nature: Volleyball is a collective competition event, except for serving, it is all carried out in collective cooperation. Therefore, it is required that both techniques Be aggressive and accurate.Ħ. This situation is more prominent in the tiebreaker game, so each technique has the duality of offense and defense. Duality of offensive and defensive techniques: Volleyball is a project in which various techniques can score or lose points. The higher the level of competition, the more intense the competition will be.ĥ. In a game, winning a point often requires six or seven rounds of confrontation. In high-level competitions, the focus of the confrontation is on the online deductions. Intense confrontation: In volleyball games, the transition of offense and defense between the two sides is always carried out in fierce confrontation. The short batting time and the changeable batting space determine the high skill of volleyball.Ĥ. A high degree of skill: The rules stipulate that the ball cannot land in the game, and it is not allowed to hold the ball or make combos. Each team member is required to carry out the team members must comprehensively master various techniques and be able to compete in various positions.ģ. Comprehensiveness of technology: The rules stipulate that each player must rotate the position, not only to the front row to smash and block the ball, but also to the back row to defend and respond. The amount of exercise can be large or small, and it is suitable for people of different ages, genders, physiques and training levels.Ģ. It can be used not only for competition and training on the court, but also for activities in general open spaces. Extensive mass: The volleyball court has simple equipment and easy to master the rules of the game. The characteristics and value of volleyballġ.
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January 2023
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