The Biomechanics Analysis of Different Postures in Prepared-Squatting to Jumping Performances
碩士 === 國立臺北教育大學 === 體育學系碩士班 === 95 === The Biomechanics Analysis of Different Postures in Prepared-Squatting to Jumping Performances Adviser: Wong Tzi-Lin Ph.D. Graduate Student: Gu Chi-Wen Abstract The purpose of this study was primarily investigated different prepared-squatting postures (knee jo...
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碩士 === 國立臺北教育大學 === 體育學系碩士班 === 95 === The Biomechanics Analysis of Different Postures in Prepared-Squatting to Jumping Performances
Adviser: Wong Tzi-Lin Ph.D.
Graduate Student: Gu Chi-Wen
Abstract
The purpose of this study was primarily investigated different prepared-squatting postures (knee joint, 70, 90, 110, 130, 150 degrees), towards to the vertical jump performances of lower limb kinematics, dynamics, myoelectric parameters changes. The testees of this study were ten male students from the Department of Physical Education of National Taipei Education University with the average age of 18.7 0.67yr, height of 172.8 6.09cm and weight of 65.4 3.89kg. A Mega speed video camera (100hz), AMTI force plate (1000hz), and Biovision myoelectric system (1000hz), and the electric knee joint meter (1000hz) were used as the experiement equipment of this study which could simulataneously gather data from all the testees with different joint knee angles, the lower limb kinematics, dynamics, myoelectric parameters changes. The kinematics parameters were photographed from high-speed video camera, and then the file received has being edited and rearranged by the APAS software, and being directly linear transformed (DLT), in order to get parameters of the joint angle displacement, angle (acceleration) velocity and the velocity (acceleration) of gravity. Dynamics and myoelectric signal parameters were obtained from the force plate and Biovision myoelectric system signals through the amplifier and low-pass filter (10hz), with conducting the quantitative analysis with using the DASYLab 6.0 software to get the ground reaction force value , impulse vlaue, and IEMG. In comparison with the three types of parameters, the SPSS 10.0 statistic software were used in this study together with the analytic method of the Repeated Measures of ANOVA, hence to compare different parameters that obtained from the prepared-squatting postures before jumping, to see if they reached the significant difference or not. If there were significant differences (P<0.05) between them, which should be applied the LSD (least significant difference) to test their post-hoc comparison. The significant level of this study was set at α=0.05. In addition, the results of this study were shown as belows:
1. In terms of the performance of different prepared-squatting vertical postures, which showed the maximum jumping height when the knee joint angle was at 130 and 150 degress (p<.05).
2. When the prepared-squatting knee joint angle was at 90 degrees, the hip joint reached its maximum angle velocity (p<.05); and when the prepared-squatting knee joint angle was at 130 degrees, the knee joint and ankle reached their maximum angle velocity (p<.05). In terms of the maximum angle acceleration, which showed the trend of increasing prepared-squatting angle would increase the angle acceleration in hip joint, knee joint and ankle.
3. Initial velocity of center-of-gravity and the maximum acceleration that all increased with the increasing prepared-squatting knee joint angle, which showed the maximum value when the prepared-squatting knee joint angle was at 150 degrees (p<.05).
4. The maximum ground reaction force increased with the increasing prepared-squatting knee joint angle and reached its maximum value when the prepared-squatting knee joint angle was at 150 degrees (p<0.05); Impulse was aslo increased with the increasing prepared-squatting knee joint angle too, which reached its maximum value when the prepared-squatting knee joint angle was at 130 degrees (p<0.05); and the stiffness decreased with the increasing prepared-squatting knee joint angle which showed its best performance when the prepared-squatting angle was at 70 degrees (p<0.05).
5. In terms of different prepared-squatting postures for vertical jump, the functioning muscle groups IEMG were all greater than the opposing muscle groups (p<0.05); Rectus Femoris IEMG showed the best performance when the prepared-squatting knee joint angle was at 130 degrees; and Tibialis Anterior Muscle IEMG showed the best performance when the prepared-squatting knee joint angle was at 90 degrees (p<0.05).
To conclude all the above results after discussions, the below conclusions were obtained: when the prepared-squatting knee joint angle was at 130 and 150 degrees that showed the best vertical jump height. Therefore, this angle would have the best performance of initial volecity of center-of-gravitity and the maximum acceleration of center-of-gravitity, as well as the best ground reaction force, impulse value and the best muscle collections and usage efficacy.
|
author2 |
Wong Tzi-Lin |
author_facet |
Wong Tzi-Lin ku chih-wen 古智文 |
author |
ku chih-wen 古智文 |
spellingShingle |
ku chih-wen 古智文 The Biomechanics Analysis of Different Postures in Prepared-Squatting to Jumping Performances |
author_sort |
ku chih-wen |
title |
The Biomechanics Analysis of Different Postures in Prepared-Squatting to Jumping Performances |
title_short |
The Biomechanics Analysis of Different Postures in Prepared-Squatting to Jumping Performances |
title_full |
The Biomechanics Analysis of Different Postures in Prepared-Squatting to Jumping Performances |
title_fullStr |
The Biomechanics Analysis of Different Postures in Prepared-Squatting to Jumping Performances |
title_full_unstemmed |
The Biomechanics Analysis of Different Postures in Prepared-Squatting to Jumping Performances |
title_sort |
biomechanics analysis of different postures in prepared-squatting to jumping performances |
publishDate |
2006 |
url |
http://ndltd.ncl.edu.tw/handle/91037625338080580644 |
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ndltd-TW-094NTPTC5670112016-06-01T04:21:08Z http://ndltd.ncl.edu.tw/handle/91037625338080580644 The Biomechanics Analysis of Different Postures in Prepared-Squatting to Jumping Performances 不同預蹲姿勢對跳躍表現之生物力學分析 ku chih-wen 古智文 碩士 國立臺北教育大學 體育學系碩士班 95 The Biomechanics Analysis of Different Postures in Prepared-Squatting to Jumping Performances Adviser: Wong Tzi-Lin Ph.D. Graduate Student: Gu Chi-Wen Abstract The purpose of this study was primarily investigated different prepared-squatting postures (knee joint, 70, 90, 110, 130, 150 degrees), towards to the vertical jump performances of lower limb kinematics, dynamics, myoelectric parameters changes. The testees of this study were ten male students from the Department of Physical Education of National Taipei Education University with the average age of 18.7 0.67yr, height of 172.8 6.09cm and weight of 65.4 3.89kg. A Mega speed video camera (100hz), AMTI force plate (1000hz), and Biovision myoelectric system (1000hz), and the electric knee joint meter (1000hz) were used as the experiement equipment of this study which could simulataneously gather data from all the testees with different joint knee angles, the lower limb kinematics, dynamics, myoelectric parameters changes. The kinematics parameters were photographed from high-speed video camera, and then the file received has being edited and rearranged by the APAS software, and being directly linear transformed (DLT), in order to get parameters of the joint angle displacement, angle (acceleration) velocity and the velocity (acceleration) of gravity. Dynamics and myoelectric signal parameters were obtained from the force plate and Biovision myoelectric system signals through the amplifier and low-pass filter (10hz), with conducting the quantitative analysis with using the DASYLab 6.0 software to get the ground reaction force value , impulse vlaue, and IEMG. In comparison with the three types of parameters, the SPSS 10.0 statistic software were used in this study together with the analytic method of the Repeated Measures of ANOVA, hence to compare different parameters that obtained from the prepared-squatting postures before jumping, to see if they reached the significant difference or not. If there were significant differences (P<0.05) between them, which should be applied the LSD (least significant difference) to test their post-hoc comparison. The significant level of this study was set at α=0.05. In addition, the results of this study were shown as belows: 1. In terms of the performance of different prepared-squatting vertical postures, which showed the maximum jumping height when the knee joint angle was at 130 and 150 degress (p<.05). 2. When the prepared-squatting knee joint angle was at 90 degrees, the hip joint reached its maximum angle velocity (p<.05); and when the prepared-squatting knee joint angle was at 130 degrees, the knee joint and ankle reached their maximum angle velocity (p<.05). In terms of the maximum angle acceleration, which showed the trend of increasing prepared-squatting angle would increase the angle acceleration in hip joint, knee joint and ankle. 3. Initial velocity of center-of-gravity and the maximum acceleration that all increased with the increasing prepared-squatting knee joint angle, which showed the maximum value when the prepared-squatting knee joint angle was at 150 degrees (p<.05). 4. The maximum ground reaction force increased with the increasing prepared-squatting knee joint angle and reached its maximum value when the prepared-squatting knee joint angle was at 150 degrees (p<0.05); Impulse was aslo increased with the increasing prepared-squatting knee joint angle too, which reached its maximum value when the prepared-squatting knee joint angle was at 130 degrees (p<0.05); and the stiffness decreased with the increasing prepared-squatting knee joint angle which showed its best performance when the prepared-squatting angle was at 70 degrees (p<0.05). 5. In terms of different prepared-squatting postures for vertical jump, the functioning muscle groups IEMG were all greater than the opposing muscle groups (p<0.05); Rectus Femoris IEMG showed the best performance when the prepared-squatting knee joint angle was at 130 degrees; and Tibialis Anterior Muscle IEMG showed the best performance when the prepared-squatting knee joint angle was at 90 degrees (p<0.05). To conclude all the above results after discussions, the below conclusions were obtained: when the prepared-squatting knee joint angle was at 130 and 150 degrees that showed the best vertical jump height. Therefore, this angle would have the best performance of initial volecity of center-of-gravitity and the maximum acceleration of center-of-gravitity, as well as the best ground reaction force, impulse value and the best muscle collections and usage efficacy. Wong Tzi-Lin 翁梓林 2006 學位論文 ; thesis 98 zh-TW |