Activation patterns in forearm muscles during archery shooting

Date

2003-02-01

Author

Ertan, Hulusi Bülent
Tümer, Sami Turgut
Korkusuz, F

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A contraction and relaxation strategy with regard to forearm muscles during the release of the bowstring has often been observed during archery, but has not well been described. The purpose of this study was to analyze this strategy in archers with different levels of expertise; elite, beginner and non-archers. Electromyography (EMG) activity of the M. flexor digitorum superficialis and the M. extensor digitorum were recorded at a sampling frequency of 500 Hz, together with a pulse synchronized with the clicker snap, for twelve shots by each subject. Raw EMG records, 1-s before and after the clicker pulse, were rectified, integrated and normalized. The data was then averaged for successive shots of each subject and later for each group. All subjects including non-archers developed an active contraction of the M. extensor digitorum and a gradual relaxation of the M. flexor digitorum. superficialis with the fall of the clicker. In elite archers release started about 100 ms after the fall of the clicker, whereas in beginners and non-archers release started after about 200 and 300 ms, respectively. Non-archers displayed a preparation phase involving extensive extensor activity before the release of the bowstring, which was not observed in elite and beginner archers. In conclusion, archers released the bowstring by active contraction of the forearm extensors, whereas a clear relaxation of the forearm flexors affecting the release movement was not observed.

Subject Keywords

Archery, Electromyography (EMG), Muscular analysis

URI

https://hdl.handle.net/11511/30459

Journal

HUMAN MOVEMENT SCIENCE

DOI

https://doi.org/10.1016/s0167-9457(02)00176-8

Collections

Graduate School of Natural and Applied Sciences, Article

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Citation Formats

H. B. Ertan, S. T. Tümer, and F. Korkusuz, “Activation patterns in forearm muscles during archery shooting,” HUMAN MOVEMENT SCIENCE, pp. 37–45, 2003, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/30459.