Estimation of time duration on the Basis of Decrease in Elbow Joint Angle for Successful Application of Choke in Judo

Objectives of this study were to find out the optimum angle for the application of chokeandto estimate time and degree with reference to angle at elbow joint. The study was delimited to selected Biomechanical variables [kinematic variables (angle ofthe elbow joint, time taken by an attacker for application of choke). The study was further delimited to male judokasof 18-21 years of age. National level Judokas only were selected for the study. It was hypothesized that the angle at the elbow joint and the time factor would significantly affect the performance of the choke.

Six university level judo players were selected for the study. The levels of subjects were decided according to their achievement in competitive judo. Since the subjects have been undergoing training for considerable period, therefore it was considered subjects posses required of technique choke. All the subjects were explained about the objectives of the study. For the study kinematic analysis of choke, the following variable were selected- Kinematic variables first Angle of the elbow joint second Time third Biceps pumpedForearm.After capturing the video,kinovea 2D software was used to find out angle and time. After finding out the proper angle and time of taking choke of each player data was analyzed by using SPSS analysis software. The statistical technique used was Regression analysis. The level of significance was set at 0.05. The result of the study shows that the biceps pumped and forearm directly affects to the angle of the elbow joint which is responsible for the decrease in the time of unconscious state.

Table 1 is showing mean of the different variables with their standard deviation around mean. The variables shown in the table are Time, Decrease in angle, Biceps pumped, Forearm, and Biceps.

Correlation is significant at the 0.01 level (2-taied) Correlation is significant at the o.o5 level (2-tailed). When the data were analyzed by using Pearson‟s Product moment correlation technique three independent variables (Decrease in angle, Biceps pumped, Forearm) correlated with the dependent variable (Time) time taken by the player going to be unconscious. Since correlation statistics does not claim any cause and effect relationship thus multiple regression equations may provide a better idea regarding making use of these independent variables for further studies.

a. Predictors: (Constant), DECREASE IN ANGLE On the basis of the present set of data, a modelhas been prepared. The model explains 80% variability in the dependent variable. According to the model developed on the basis of present data the variables (decrease in angle, biceps pumped, forearm) all together has the power to predict the time of conscious 76.4%.

Although the models developed on the basis of present data are significant because the associated significance value is less than 0.05.

In table 5 unstandardized and standardized coefficients have been presented these coefficients have two major roles. The unstandardized coefficients were used for developing the prediction equation while standardized coefficients represent the individual contribution of the particular variable toward the dependent variable. In the case of selected variables, the value of the coefficient of correlation at selected moments were found insignificantly, but this trend does not mean that other variables do not affect decreasing in time to be unconscious or tapping on the mat while performing choke. This can be attributed to the fact that the opponent‟s height was not equal to the performer. Every selected variable significantly correlates to time. In terms of decreasing in time every variable has a major or minor role, they correlate either positive or negative like the angle of the elbow joint directly correlates to the performance of choke, As in this study the researcher was only confined to the relationship of selected variable Biceps pumped is negatively correlated as we pumped our biceps and try to perform choke it helps to reduce the time of opponent‟s falling. Study shows that the forearm also affects the time taken to sleep or unconscious, big forearm muscle makes low which directly affect the unconsciousness of the opponent. If we have a minor muscle of the biceps and forearm it will also affect to angle which directly affects the result. As a whole it may be ascertained that the irregular value of the co-efficient of correlation shown by the selected variables does not mean these variables are not contributing to the performance of subjects in the choke, however, the insignificant value of the coefficient of correlation of these variables with the performance may be due to small sample size and non-availability of sophisticated equipment, these difference were attributed to the good upper body to elbow joint the time of execution is also decreased so it is directly affected. The result suggests that the performer should increase the muscle mass so the optimum angle can be found so it can be easy to perform choke.

On the ground provided by SPSS outputs the following logical conclusions have been drawn Choking time = 1.625 + (decrease in angle) ×.284 The following equation tells that overall choking time depends on 1.625 constant second with a decrease the angle of the elbow joint and its multiple with .284 coefficient value. Suppose a person decrease 10 degree angle in elbow joint so we can calculate by this equation

Choking time = 1.625 + (decrease in angle) ×.284

= 1.625 + 10× .284

= 4.615 seconds

1. Takashiko Ishikawa And Donnf.Draeger, Dreager“,Judo Training Methods” (Tokyo:Charles E, Tuttle Company, 1964),Pp.78-79 2. MukeshKumar,”Action Judo” (Delhi:Sports Publication,1994),Pp.23 3. Barraw,Hararold M. “Man And Movement: Principle Of Physical Education” 3rd Ed. Philadelphia: Lea And Fibiger, 1983. 4. Thekodakon, Judo Japan; NunoishopoCo.Ltd.,(1961),Pp.148. 5. Butcher, Alex.Judo London : New Holland Publication Ltd. 2001 6. Dull. Charles E. “Modern Physics” New York: Holl Rinehart And Winston Inc.,1960. 7. Glass, Geoger,” Know The Game Judo” 2nd Ed. Englan: E.P Publishing Ltd.1988. 8. Griffiths,Cerri. “Understanding How Judo Technique Work: A Biomechanical Explanation”, 1999. 10. KreighbaumRllen and Barthels K.M” Biomechanics” 1994. 11. Reay Tony Hobbs Geffrey.”Judo Manual” London: Barrie And Jankinscompany,1992. 12. Smith, Robert W. A Complete Guide To Judo Japan: Cgarles E Tuttle Co., 1958. 13. Zumikoi, G. My Study Of Judo London :W.Foulshran and Co.,1960. 14. Pucsoc J.M, Nelson K. and ED Ng. (2001) “A kinetic and kinematic analysis of the Harai-goshijudotechnique”.Actaphysiologicalhungaricahttps://doi.org/10.1556/A physiol.88.2001.3-4.9 15. M.Ikai,T.Ishiko,G.Ueda.(1958) “Physiological Studies On "choking" in judo”. chokinghttps://www.researchgate.net/publication/313119075_Physiological_Studies_On_choking_in_judo/citations 16. RodeneyT.Imamura, Alan Hreljac,Rafel F. Ecamilla, and w. brent Edwards.(2006).”A Three-Dimensional Analysis of the Centre Of Mass For three different judo throwing techniques” journal of sports science and medicine.(CSSI):122-131.. 17. Takanoriishii, michiyashi A (2014) biomechanics factors of effective seoi-nage, 32nd international conference of biomechanics in sports issn 1999-4168.

Scholar, L.N.I.P.E GWALIOR