The purpose of the present study was to investigate the effect of different training surfaces (hard or sand surface) on agility and passing skills of prepubescent female volleyball players. 45 prepubescent girls (age: 11.1 ± 0.5 years) participated in this study and were separated in three groups. Groups S (N=15) and I (N=15) consisted of volleyball players, while group C (N=15) consisted of gi...

Since the teaching ability has been influenced by many factors in volleyball sports teaching, it is more difficult to make objective and fair evaluation to mark it. At present, the evaluation volleyball teaching ability is mainly based on the following aspects, such as students’ academic achievements students’ evaluation for teacher and the finished status of teaching projects. All the evaluati...

The aim of this study was to investigate the relationship between locus of control with coping styles of problem-focused, excited -focused and avoidance among volleyball young men, Karaj City, Iran. The research method was correlation-descriptive that was implemented as monitoring. The population of this research was 200 volleyball young men that several teams of participating teams were chosen...

Countermovement jumps loaded with a weighted vest are often used for the training of lower body power to improve jump performance. However, it is currently unknown how this added load affects the lower extremity kinematics and kinetics, in particular whether this results in an increased injury risk. Therefore, the purpose of this investigation was to determine how lower extremity kinematics and...

ABSTRACT Introduction: Volleyball is a technical and team game where individual physical conditioning of the athletes has fundamental role in competition. The maintenance this includes optimization function gain body resistance. ability to respond front defensive volleyball one main keys determining their skills overall level. Objective: Investigate reflexes players during an athletic competiti...

The aim of this study was to determine how elite volleyball players employed the arm swing (AS) to enhance their jump performance. The study assessed how the AS influenced the duration and magnitude of the vertical ground reaction force (VGRF) during the main phases (preparatory, braking and accelerating) of the countermovement vertical jump (CMVJ), the starting position of the body at the begi...

BACKGROUND A variety of performance outputs are strongly determined by lower limbs volume and composition in children and adolescents. The current study aimed to examine the validity of thigh volume (TV) estimated by anthropometry in late adolescent female volleyball players. Dual-energy X-ray absorptiometry (DXA) measures were used as the reference method. METHODS Total and regional body com...

BACKGROUND Although differences in mechanical properties between symptomatic and healthy tendons have been observed for the Achilles tendon, the impact of tendinopathy on patellar tendon mechanics is not fully documented. The aim of the present case-control study was to assess the mechanical properties of the tendon and jump performance in elite athletes with and without patellar tendinopathy. ...

the purpose of this study was to investigate the relationship between conflict type (task, relation), conflict management approach (cooperative, competitive) and team effectiveness of iranian super league volleyball clubs. the sample consisted of all players and coaches of 13 teams from 16th tournament of super league volleyball clubs in 2007 were selected. jhen conflict type questionnaire, tjo...