The purpose of this study was to compare the selected biomechanical parameters of spike service between intervarsity and intercollegiate level volleyball players. Twelve (6 Intervarsity and 6 Intercollegiate level) male volleyball players were selected as the subjects for this study from Aligarh, Uttar Pradesh, India. The mean age, height, body weight, arm length and leg length of intervarsity players were 22.25 years (SD 0.94), 178.33 cm (1.06), 69.67kg (1.29), 59.74 cm (1.05) and 87.74 (1.73) respectively, whereas intercollegiate players were 21.92 years (SD 0.66), 173.56 cm (1.65), 67.50 kg (1.38), 57.17 (1.25) and 86.32 (1.83) respectively. All subjects were right-handed volleyball players. The players were allowed to have warm-up and trials. Each subject was asked to do the spike service. Five services were recorded from one side of the body with a high speed camcorder (Canon Legria HF S10) operating at 1/2000 with a frame rate of 60 frames per second. Data were collected from the movement onset until the ball crosses the net (successful). The camcorder was placed on a tripod at the height of 6 feet on the right angle of the subjects at a distance of 12 meters away to the side-line. Recorded data were digitized with the help of Silicon Coach Pro7 motion analysis software. The selected kinematics variables were ball height, jump height, hand velocity and ball velocity. The other segmental angles were also be studied in this study those were ankle angle, knee angle, hip angle, shoulder angle, elbow angle and wrist angle. The t-test was used for statistical analysis of the data by using SPSS-18 version software. The results revealed that insignificant difference exits between intervarsity and intercollegiate level male volleyball players in the spike serve performance

Hussain, Ikram

Khan, Asim

Mohammad, Arif

English

International Institute for Science, Technology and Education (IISTE): E-Journals

Journal of Education and Practice - Vol 2, No 2  www.iiste.org ISSN 2222-1735 (Paper)   ISSN 2222-288X (Online)  The International Institute for Science, Technology and Education (IISTE) www.iiste.org   A Comparison of Selected Biomechanical Parameters of  Spike Serves between Intervarsity and Intercollegiate  Volleyball Players  Ikram Hussain Department of Physical Health and Sports Education,  Aligarh Muslim University, Aligarh, 202002, (U.P.), India.  E-mail: ikram.husain@gmail.com  Asim Khan (Corresponding author) Department of Physical Health and Sports Education, Aligarh Muslim University, Aligarh, 202002, (U.P.), India.  E-mail: khanasim100@gmail.com  Arif Mohammad Department of Physical Health and Sports Education,  Aligarh Muslim University, Aligarh, 202002, (U.P.), India.  E-mail: arifmohammad@hotmail.co.in The present empirical research work has been undertaken under UGC, SAP (DRS-I) Programme, running in the Department of Physical Health and Sports Education, Aligarh Muslim University, Aligarh, India. Abstract The purpose of this study was to compare the selected biomechanical parameters of spike service between intervarsity and intercollegiate level volleyball players. Twelve (6 Intervarsity and 6 Intercollegiate level) male volleyball players were selected as the subjects for this study from Aligarh, Uttar Pradesh, India. The mean age, height, body weight, arm length and leg length of intervarsity players were 22.25 years (SD 0.94), 178.33 cm (1.06), 69.67kg (1.29), 59.74 cm (1.05) and 87.74 (1.73) respectively, whereas intercollegiate players were 21.92 years (SD 0.66), 173.56 cm (1.65), 67.50 kg (1.38), 57.17 (1.25) and 86.32 (1.83) respectively. All subjects were right-handed volleyball players. The players were allowed to have warm-up and trials. Each subject was asked to do the spike service. Five services were recorded from one side of the body with a high speed camcorder (Canon Legria HF S10) operating at 1/2000 with a frame rate of 60 frames per second. Data were collected from the movement onset until the ball crosses the net (successful). The camcorder was placed on a tripod at the height of 6 feet on the right angle of the subjects at a distance of 12 meters away to the side-line. Recorded data were digitized with the help of Silicon Coach Pro7 motion analysis software. The selected kinematics variables were ball height, jump height, hand velocity and ball velocity. The other segmental angles were also be studied in this study those were ankle angle, knee angle, hip angle, shoulder angle, elbow angle and wrist angle. The t-test was used for statistical analysis of the data by using SPSS-18 version software. The results revealed that insignificant difference exits between intervarsity and intercollegiate level male volleyball players in the spike serve performance.    Journal of Education and Practice - Vol 2, No 2  www.iiste.org ISSN 2222-1735 (Paper)   ISSN 2222-288X (Online)  The International Institute for Science, Technology and Education (IISTE) www.iiste.org   Keywords: Volleyball, spike service, intervarsity, segmental angle. 1. Introduction One of the most dramatic skills in modern volleyball is the spike serve or the jump serve which provides an exciting and dynamic skill that is captivating for players and spectators alike. It is very difficult to win matches without an efficient serve (Hayrinen et al., 2000). The most used technique of serve in men’s international top volleyball is jump serve. The efficiency of jump serve is related to the velocity of the serve (Hayrinen et al., 2009). The biomechanics of jump serve has been studied before by Coleman (1997), Huang and Hu (2007) and Masamura et al. (2007), but the serve velocities have increased so there was a need to update earlier findings and to investigate which elements have the biggest effect to the velocity of the jump serve. The player starts about four to five meters behind the end line of the court, uses a fast run up, a dynamic spike take-off and an exciting spike action at the peak of their jump that sends the ball across the net. The spike serve has become a dangerous offensive weapon for the top volleyball teams of today, as a great spike server can produce a number of aces over the course of a match. The spike serve is somewhat similar to the spike at the net, except the velocities after impact are somewhat lower for the serve when compared to the spike (Tant et al., 1993). A study of the spike vs. the serve for collegiate volleyball players revealed similar speeds for the male athletes but slower speeds for the female serve when compared to the spike (male jump serve 19.7 m/s, male spike 22.4 m/s, female jump serve 13.2 m/s, female spike 17.8 m/s). A study of the front row spikes of elite international volleyball spikers reported mean impact ball speeds of 27 m/s (Coleman, 1993). The players who are generally very tall and have very high vertical jumps that allow them to produce a downward angle on the ball: a fact exacerbated by the heavy topspin usually applied. Their strength and athleticism also allow them to produce very high hand velocities at impact that produce high ball velocities that are very difficult for the opponent to return. An examination of the serves of the players at different level may provide some useful information regarding optimal technique, so that other skilled players will be able to emulate this skill and improve their own ball speed and accuracy.  The spike serve has many similarities to the spike itself. The player strikes the ball with maximum force at the peak of his jump, and tries to place it so that the opponent cannot receive it cleanly. It has been suggested that a successful spike is determined by three factors, which are likely similar to those of the jump serve: the position of the ball at impact, the speed of the ball after impact, and the direction of movement of the ball after impact (Chung et al., 1990). In the jump serve the ball position at impact is determined by the toss of the server - an effective serve requires a perfectly placed toss and a perfectly timed run up. The higher the point of impact, the sharper the downward angle of the serve, and the more margins for error there is for the server to utilize a higher ball velocity. This makes it faster to arrive on the other side of the net and thus there is less time for the receiver to interpret the path of the ball and move into position to play it, increasing the chance of an error or an inaccurate pass. Therefore, it was the aim of this study to provide descriptive kinematics of some of the biomechanical factors involved in the jump serve.  2. Methodology The principal method used is comparative kinematics method, aimed at finding the differences in kinematics variables purpose in gaining information of spike serve performance between intervarsity and intercollegiate level volleyball players.  2.1 Selection of Subject A total twelve (6 Intervarsity and 6 Intercollegiate level) male volleyball players were taken as the subject for the study from the Aligarh district of Uttar Pradesh, India. The mean age, height, body weight, arm length and leg length of intervarsity players were 22.25 years (SD 0.94), 178.33 cm (1.06), 69.67kg (1.29), 59.74 cm (1.05) and 87.74 (1.73) respectively, whereas intercollegiate players were 21.92 years (SD 0.66), 173.56 cm (1.65), 67.50 kg (1.38), 57.17 (1.25) and 86.32 (1.83) respectively. All subjects in this study were right-handed volleyball players. They all were healthy and don’t had any injury reported within the Journal of Education and Practice - Vol 2, No 2  www.iiste.org ISSN 2222-1735 (Paper)   ISSN 2222-288X (Online)  The International Institute for Science, Technology and Education (IISTE) www.iiste.org   last year.   2.2. Tools and Equipments For the purpose of this study a high speed camcorder (Canon Legria HF S10), camera tripod, measuring tape, marking powder, volleyballs, volleyball court, motion analysis software (Silicon Coach Pro7) and computer system were used.  2.3. Procedure for Data Collection For the kinematical data a high speed Canon Legria HF S10 camcorder operating at 1/2000 with a frame rate of 60 frames per second was used to capture the spike serve performance. Data was collected from the movement onset until the ball crosses the net. The camcorder was placed perpendicular at a distance of twelve meters on the right side of the players mounted at a height of six feet above the ground and capture video clips of sufficient coverage to clearly see the spike serve process. All subjects performed five officially allotted serve but the best one valid (successful) serve was selected for further analysis. The recorded video footages were downloaded, slashed and edited by using the downloaded version of STHVCD55 Software. Digitization, smoothing and analysis were conducted using the Silicon Coach Pro7 motion analysis software. The selected kinematics variables were ball height, jump height, ball velocity and hand velocity. The other selected parameters were ankle angle, knee angle, hip angle, shoulder angle, elbow angle and wrist angle.   3. Result  Table 1: Anthropometric descriptions of Intervarsity and Intercollegiate male Volleyball Players Groups Mean & SD Anthropometric Description Age Height Weight Arm Length Leg Length Intervarsity Mean 22.25 Yrs 178.33 cm 69.67 Kg 59.74 cm 87.74 cm SD 0.94 Yrs 1.06 cm 1.29 Kg 1.05 cm 1.73 cm Intercollegiate Mean 21.92 Yrs 173.56 cm 67.50 Kg 57.17 cm 86.32 cm SD 0.66 Yrs 1.65 cm 1.38 Kg 1.25 cm 1.83 cm  Table 2: Indicating Mean, Standard Deviation and t values of selected Biomechanical Parameters of Spike Serve Performance between Intervarsity and Intercollegiate level Volleyball Players  Biomechanical Parameters Intervarsity Intercollegiate Cal. t  Mean SD Mean SD Ball Height (Meter) 2.17 0.10 2.02 0.08 0.001 Jump Height (Meter) 0.92 0.02 0.85 0.04 0.02 Ball Velocity (m/s) 22.67 1.74 21.78 1.15 0.20 Hand Velocity (m/s) 12.72 0.72 11.05 0.50 0.004  *Significant at 0.05 level of significance with 10 df                     Tab. t = 2.23  The result of the statistical analysis revealed that there is no significant difference exist between intervarsity and intercollegiate players in their all the parameters studies presented in table-1 (ball height, jump height, Journal of Education and Practice - Vol 2, No 2  www.iiste.org ISSN 2222-1735 (Paper)   ISSN 2222-288X (Online)  The International Institute for Science, Technology and Education (IISTE) www.iiste.org   ball velocity and hand velocity). It has showed that the calculated t values of all the selected variables were less than tabulated t value (2.23) at 0.05 level of significance with 10 degree of freedom.  Table 3: Indicating t values of selected body joint angles between Intervarsity and Intercollegiate level Volleyball Players Segmental angle Intervarsity Intercollegiate Cal. t Mean SD Mean SD Ankle Angle (Degree) 162.55 3.61 161.67 5.60 0.34 Knee Angle (Degree) 173.88 3.46 170.63 3.65 0.12 Hip Angle (Degree) 171.30 2.48 168.07 2.03 0.003 Shoulder Angle (Degree) 156.14 3.91 153.40 4.04 0.10 Elbow Angle (Degree) 152.64 3.01 154.71 1.62 0.13 Wrist Angle (Degree) 166.92 1.37 153.34 2.56 1.05    *Significant at 0.05 level of significance with 10 df           Tab. t = 2.23  The result of the statistical analysis of spike (jump) serve revealed that there is no significant difference exist between intervarsity and intercollegiate players in their all the variables studies presented in table-1 (ankle angle, knee angle, hip angle, shoulder angle, elbow angle and wrist angle). It has showed that the calculated t values of all the selected parameters were less than tabulated t value (2.23) at 0.05 level of significance with 10 degree of freedom.  Figure 1: Showing Comparison of Ball Height, Jump Height, Hand Velocity and Ball Velocity between Intervarsity and Intercollegiate Volleyball Players     Journal of Education and Practice - Vol 2, No 2  www.iiste.org ISSN 2222-1735 (Paper)   ISSN 2222-288X (Online)  The International Institute for Science, Technology and Education (IISTE) www.iiste.org   Figure 2: Showing Comparison of Different Joint Angles between Intervarsity and Intercollegiate Volleyball Players  4. Discussion It was the aim of this study to examine the mechanical factors between two levels of volleyball players underpinning the jump or attack serve. The result of the present study indicated that there is no significant differences exist between intervarsity and intercollegiate volleyball players in their ball height, jump height, ball velocity and hand velocity. Further insignificant differences were found between these two groups in their different body joint angles (ankle, knee, hip, shoulder, elbow and wrist). This might be due to the fact that the variation in the ball height, jump height, ball velocity and hand velocity of intervarsity and intercollegiate volleyball players is very less. Secondly the angle of the segments during spike serve between intervarsity and intercollegiate may be same but the movement forces applied on the ball may be differ and not dependent on the angle of segment but on the speed of change of angle which is return increase the velocity of segment to transfer to the ball. Here we also found that when the hand velocity was higher the ball velocity was also higher. It shows that the ball velocity is directly correlated with the hand velocity.   5. Conclusion On the basis of the findings it is concluded that intervarsity and intercollegiate level volleyball players were no significantly differ in their ball height, jump height, ball velocity, hand velocity further insignificant differences were found in their ankle angle, knee angle, hip angle, shoulder angle, elbow angle and wrist angle this is due to the level of the participants in this study is almost similar. But we also found that good power production abilities in the core, shoulder and arm and optimal function of the kinetic chain are the most important elements in producing maximum velocities in jump serve as well as the mobility of the hip joint and the thoracic vertebrae are important factors in achieving maximum ball velocities in jump serve. References Chung, C., et al. (1990). Three-dimensional kinematics of the spiking arm during the volleyball spike. Korean Journal of Sport Science, 2, 124-151. Journal of Education and Practice - Vol 2, No 2  www.iiste.org ISSN 2222-1735 (Paper)   ISSN 2222-288X (Online)  The International Institute for Science, Technology and Education (IISTE) www.iiste.org   Coleman, S. G. S. (1993). A three-dimensional cinematographic analysis of the volleyball spike. Journal of Sport Sciences, 11, 295-302. Coleman, S. (1997). A 3D kinematic analysis of the volleyball jump serve. Proceedings of the XV International Symposium on Biomechanics in Sports. Denton, Texas Women University, Texas, USA. Coleman, S. (2005). A 3D kinematic analysis of the volleyball jump serve. from http://www.coachesinfo.com/index.php?option=com_content&view=article&id=375:3dkinematic-article&catid=103:volleyball-generalarticles&Itemid=197.  Huang, C. F., Liu, G. C., and Sheu, T. Y. (1999). Kinematic analysis of the volleyball back row jump spike. In R. H. Sanders & B. J. Gibson (Eds.), Proceedings of the XVII International Symposium on Biomechanics in Sports , 49-52.  Hayrinen, M., et al. (2000). Biomechanical analysis of jump serve in men’s volleyball.  KIHU - Research Institute for Olympic Sports, Jyväskyla, Finland, Finnish Volleyball Association, Helsinki, Finland. Hayrinen, M., et al. (2009). Time analysis of men’s and youth boy’s top-level volleyball. KIHU - Research Institute for Olympic Sports, Jyvaskyla, Finland, Finnish Volleyball Association, Helsinki, Finland. Samson. J. and Roy, B. (1976). Biomechanical analysis of the volleyball spike. In Biomechanics V-B (edited by P. Komi), 332-336. Saunder, H. L. (1980). A Cinematographical study of the relationship between speed of movement and available Force. Unpublished Doctoral Dissertation. College Station, TX: Texas A & M University. Tant, C. L., et al. (1993). A comparison of the volleyball jump serve and the volleyball spike. Biomechanics in SPorts XI, University of Massachussetts, International Society of Biomechanics in Sports.   This academic article was published by The International Institute for Science, Technology and Education (IISTE).  The IISTE is a pioneer in the Open Access Publishing service based in the U.S. and Europe.  The aim of the institute is Accelerating Global Knowledge Sharing.  More information about the publisher can be found in the IISTE’s homepage:  http://www.iiste.org  The IISTE is currently hosting more than 30 peer-reviewed academic journals and collaborating with academic institutions around the world.   Prospective authors of IISTE journals can find the submission instruction on the following page: http://www.iiste.org/Journals/ The IISTE editorial team promises to the review and publish all the qualified submissions in a fast manner. 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A Comparison of Selected Biomechanical Parameters of Spike Serves between Intervarsity and Intercollegiate Volleyball Players

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A Comparison of Selected Biomechanical Parameters of Spike Serves between Intervarsity and Intercollegiate Volleyball Players

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