Comparably analysis of the difference between the performance of drop-jump and counter-movement jump

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Show simple item record Chen, Kai-Yun en_US 2011-06-03T19:29:21Z 2011-06-03T19:29:21Z 1990 en_US 1990
dc.identifier LD2489.Z9 1990 .C47 en_US
dc.description.abstract In the literature, the drop jumping, one of the most popular plyometric drills, is advocated as an effective exercise to increase strength and nerve-reactive ability which will improve the vertical jumping ability. When executing drop jumps, different jumping techniques can be used. There are many reports about the influence of drop jumping by different heights or angles of knee, and hip. However there are few reports on the kinematics and muscular activity involved between drop jump techniques. In this study, two subjects executed 1) drop jumps (DJ) from a height of 30 cm and 50 cm, and 2) counter-movement jumps (CMJ). During each jumping movement, the subjects were filmed. In addition electromyographic (EMG) recordings from rectus femoris muscle were obtained and synchronized with the ground reaction force from the force platform. The results showed 1) the height of shoulder at the start of push-off was higher in DJ than in CMJ; 2) the angle of hip was significantly greater in DJ than in CMJ at the start of push-off, 3) DJ had much shorter downward time and push time than CMJ; 4) no significant difference was indicated in terms of peak to peak EMG value from rectus femoris between the two jumps; 5) Peak-to Peak EMG signal did not occur simultaneous with peak vertical force; and 6) no significant difference between the jumping height between DJ and CMJ. There are some limitations which needed to be considerated. Based on the above findings, it is suggested that the horizontal displacement or speed in drop jump might play an important role in influencing the performance. In term the jumping height, we can not say which technique was better than the other, but the author suggests further research on the biomechanics and EMG characteristics which might be influenced by multiple control of the jumping techniques. en_US
dc.description.sponsorship School of Physical Education
dc.format.extent vi, 42 leaves : ill. ; 28 cm. en_US
dc.source Virtual Press en_US
dc.title Comparably analysis of the difference between the performance of drop-jump and counter-movement jump en_US
dc.type Research paper (M.A.), 3 hrs. en_US Thesis (M.A.) en_US
dc.identifier.cardcat-url en_US

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  • Research Papers [5068]
    Research papers submitted to the Graduate School by Ball State University master's degree candidates in partial fulfillment of degree requirements.

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