Reliability and validity testing of an archery chronometer

Date

2005-06-01

Author

Ertan, Hulusi Bülent
Tümer, Sami Turgut

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

57
views

0
downloads

Keeping the arrow velocity constant during consecutive shots and responding to "clicker's fall" are considered to be an important feature of archery performance. A specially designed device called an archery chronometer was developed to measure the reaction time of an archer to clicker's fall, arrow velocity, and external factors that may affect arrow velocity. The purposes of this study were to test ( 1) the validity of Clicker Reaction Time (CRT) measurer, and ( 2) the reliability of CRT in accordance with the Flying Time ( FT)/Average Speed ( AS), temperature ( TEMP), wind speed (WS) and wind direction (WD) measurements. 20 elite archers participated in this study. The Reaction Time (RT), which was derived from EMG values and CRT from the archery chronometer were correlated to test the validity of the CRT measurer. The test re-test method was applied to test the reliability of archery chronometer. CRT scores were related with RT scores (r =.787, p < 0.01). The archery chronometer was valid in terms of predicting reaction time. The device was found to be reliable in measuring CRT, AS, FT, WS, WD, and TEMP. It was concluded that archery chronometer could be used for technical evaluation and enhancing ones shooting technique in archery.

Subject Keywords

Archery, Electromyography (EMG), Reaction Time, Muscular Analysis

URI

https://hdl.handle.net/11511/55627

Journal

JOURNAL OF SPORTS SCIENCE AND MEDICINE

Collections

Graduate School of Natural and Applied Sciences, Article

Suggestions

OpenMETU
Core

Activation patterns in forearm muscles during archery shooting Ertan, Hulusi Bülent; Tümer, Sami Turgut; Korkusuz, F (2003-02-01) 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 cli...
Quantification the relationship between FITA scores and EMG skill indexes in archery Ertan, Hulusi Bülent; Korkusuz, F (2005-04-01) Forearm electromyographic (EMG) data are assumed to be an effective method in estimating performance level in archery. The aim of the current study was to establish archery skill indexes based on EMG data. Elite (n = 7, FITA score = 1303.4 +/- 26.2), beginner (n = 6, FITA score = 1152 +/- 9.0) and non-archers (n = 10, assumed FITA score = 250 +/- 0), were involved in the study. EMG activity of Muscle flexor digitorum superficialis and Muscle extensor digitorum were quantified. Two-second periods - 1 s befor...
Experimental and analytical determination of friction torque of a double row roller slewing bearing Dindar, Ahmet; Çalışkan, Mehmet; Akkök, Metin; Department of Mechanical Engineering (2015) Friction at low speeds is accepted as the most dominant destabilizing factor in gun turrets, since precise aiming to the target is conducted at low speeds. So, the causes and mechanisms of friction in gun turrets should be investigated. The friction is mainly caused by the bearings in the rotation axes. In this thesis, investigation on the friction torque of a double row roller slewing bearing which is operated in the azimuth axis of a gun turret is performed. For this purpose, a friction measurement test s...
Failure analysis of advanced composites under impact by cohesive zone method Doğan, Oğuz; Parnas, Kemal Levend; Department of Mechanical Engineering (2013) The main objective of this study is to investigate the delamination damage of laminated composites subjected to low velocity impact. Three-dimensional finite element analyses are conducted to determine delamination area, shape and location. The impact analysis is performed by using the explicit finite element method which uses the central difference rule to integrate the equations of motion through the time. The composite structures are modeled using eight-node solid elements. The critical interfaces betwee...
Fatigue and static behavior of curved composite laminates Taşdemir, Burcu; Çöker, Demirkan; Department of Aerospace Engineering (2018) By virtue of the fact that curved composite laminates which are utilized as load carrying subcomponents in aircraft and wind turbine structures are subjected to cyclic loading during their operating time, it is crucial to understand fatigue failure mechanisms at least as much as static failure mechanisms. With the intention of understanding fatigue failure mechanisms and thus improving fatigue life of structures, these curved laminates are investigated experimentally under static and fatigue loadings. The f...

Citation Formats

H. B. Ertan and S. T. Tümer, “Reliability and validity testing of an archery chronometer,” JOURNAL OF SPORTS SCIENCE AND MEDICINE, pp. 95–104, 2005, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/55627.