Boksörlerde Esneklik ve Dengenin Direk Yumruk Kinematiği ile İlişkisi+

Abstract

Soykurt M. The study of correlation of the balance and flexibility with the kinematics of direct punch in boxing. Hacettepe University, Institution of Health Science, Sports Physiotherapy Program, Thesis of Master Degree, Ankara, 2017. The aim of the study was to investigate the effects of flexibility and balance of trunk and lower extremity on the force and speed of direct punch, which are the most important determinants of performance. 20 healthy Turkish boxers were included in the study. Demographics (Age, height, weight, dominant hand, sport age) of the boxers were recorded. Biodex balance instrument (Biodex Medical Systems Inc., Shirley, NY) was used to obtain dynamic and static balance scores of the participants. The trunk and lower extremity flexibilities were determined through; Trunk hyperextension, trunk lateral flexion, trunk rotation, sit-reach, m. hamstring, m. gastrocnemius and m. quadriceps tests. Using video camera method, direct punch technique was recorded, and processed with MATLAB based software. Among the data acquired, for the normally distributed data Pearson correlation coefficient was computed, and for the data with non-normal distribution Spearman Rho correlation coefficient was computed. For the comparison of 3 weight classes included, Kruscal-Wallis was calculated. The results of the investigation showed that there is correlation between trunk lateral flexion of non-dominant side and the strength and the speed of the punch (r:0.54; p<0.05) whereas, flexibility of non-dominant side trunk rotation was found to be correlated with only punch strength (r:0.49; p<0.05). When the Limits of Stability balance tests, at difficulty level 6, was run on the participants, it was observed that the balance was mostly focused on the backside. According to athletic single leg stance balance total and medial-lateral stability indexes, the best balance was in middleweight class while heavy weight class had the worst balance among the weight classes. (p<0.05). Quadriceps Ely’s test showed statically significant differences between classes. The results suggested that the most flexible class was lightweight whereas the least flexible group was middleweight (p>0.05), according to the non-dominant side measurements. In terms of weight classes, no statistical difference was seen in the strength and the speed of punch (p>0.05). In conclusion dynamic balance of heavy weight boxers was worse than that of other weight classes. It was showed that the flexibility of non-dominant side trunk lateral flexion has effect on the punch performance. It was understood that balance and flexibility should be considered for improving the punch performance and that balance and flexibility exercises should be included in the training programs. Further investigation is required regarding the effects balance on punch performance.