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Muscular activity of different shooting distances, different release techniques, and different performance levels, with and without stabilizers, in target archery.
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Muscular activity of different shooting distances, different release techniques, and different performance levels, with and without stabilizers, in target archery.

著者: JP Clarys 附属: Institute of Physical Education and Physiotherapy, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel, Belgium.J CabriE BollensR SleeckxJ Taeymans所有著者
版本/格式: 文章 文章 : 英语
刊登在:Journal of sports sciences, 1990 Winter; 8(3): 235-57
数据库:取自MEDLINE®/PubMed®,这是美国医学图书馆的一个数据库。
提要:
The quadruple approach in the title refers to four different studies over a period of 3 years. The common factor in these studies is the methodology of the (Brussels) Electromyographic Signal Processing and Analysis System (ESPAS), a hardware and software EMG data acquisition system that has constantly been improved. Therefore, the ESPAS methodology is described extensively (i.e. the electrodes, amplifier,  再读一些...
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文件类型: 文章
所有的著者/提供者: JP Clarys 附属: Institute of Physical Education and Physiotherapy, Faculty of Medicine and Pharmacy, Vrije Universiteit Brussel, Belgium.; J Cabri; E Bollens; R Sleeckx; J Taeymans; M Vermeiren; Van Reeth G; G Voss
ISSN:0264-0414
语言注释: English
专有的标识符 118765219
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摘要:

The quadruple approach in the title refers to four different studies over a period of 3 years. The common factor in these studies is the methodology of the (Brussels) Electromyographic Signal Processing and Analysis System (ESPAS), a hardware and software EMG data acquisition system that has constantly been improved. Therefore, the ESPAS methodology is described extensively (i.e. the electrodes, amplifier, tape-recorder and processing hardware). Experiment 1 investigated muscular behaviour in target shooting, both indoors (18 and 25 m) and outdoors (50, 70 and 90 m). It was found (via iEMG) that a significant increase in activity only exists between 25 and 50 m, and that there is no linear increase of activity with increased distance. No differences in muscular pattern (IDANCO system: Clarys and Cabri, 1988) or activity between the indoor distances and between the outdoor distances were found. Experiment 2 investigated the muscular economy of four string grips: the three-finger grip, two-finger grip, thumb grip and reversed grip. The largest variations in activity were found for the two most unfamiliar grips, i.e. the thumb and reversed grips; however, low iEMG and the rapid precision improvement (over a limited number of shots) suggest that the thumb grip, if practised long enough, might be the most economical technique. Experiment 3 attempted to differentiate muscular activity and a number of performance variables in three different populations of archers--Olympic athletes, National competitors and beginners--in order to obtain feedback regarding improved performance. Apparently, overall muscle pattern, intensities and arrow speed were not discriminatory. The differences found between the groups (or levels of skill) were affected by the ability to reproduce identical patterns and arrow velocities in consecutive shots and by the constancy of neuromuscular control of the M. trapezius, M. biceps brachii and M. extensor digitorum. Finally, Experiment 4 investigated the muscular activity of elite archers shooting at distances of 70 and 90 m with and without stabilizers. Differences in iEMG were not supported by differences in precision. Over time, the low iEMG in shooting without stabilizers increases precision and delays fatigue.

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