Browsing by Author "Balci Ş.S."

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Comparison of physiological and perceptual load between uke and tori after intermittent osaekomi-waza exercise in judo
(2022-01-01) Ceylan B.; Balci Ş.S.
This study investigated differences in physiological and perceptual responses between uke and tori during intermittent osaekomi-waza exercise. Twenty-one male judo athletes voluntarily participated in this study. Following anthropometric measurements and 1 min uchi-komi test, athletes executed 20 s × 6 sets (1:½ work rest ratio) intermittent osaekomi-waza exercise with kesa-gatame as both uke and tori. Athletes’ heart rate and lactate concentration were monitored at rest, 1 min, and 6 min following the exercise while the athletes classified the rate of perceived exertion just after the exercise. During the experiment, the changes in heart rate were different between positions with higher values in uke position compared to tori position after the intermittent exercise (F2,40 = 4.28, p = 0.03). Moreover, athletes in the uke position stated a higher rating of perceived exertion than athletes in the tori position (p = 0.01). However, blood lactate responses were found to be similar between positions (p > 0.05). Intermittent osaekomi-waza exercises resulted in similar metabolic load for uke and tori positions, while higher cardiovascular load was observed in the uke position compared to the tori position. Thus, it can be concluded that the athletes in uke position are exposed to more cardiovascular load compared to those in tori position and present higher perceptual responses.
Forbidden actions in World Judo Championships: differences between winner and non-winner athletes
(2021-01-01) Ceylan B.; Kajmovic H.; Kapo S.; Colakhodzic E.; Balci Ş.S.
Penalties in judo result from negative actions that are not in line with judo combat regulations. The aim of the research was to determine the differences in penalties between winner and non-winner competitors in judo. A total of 1799 (men=1133 and women=666) matches with penalties were evaluated during 2017, 2018 and 2019 World Judo Championships. The variables were expressed as proportions and compared with the Chi-Square test with pairwise Z-tests. The ratio of receiving the first and second shido was the same in men and women athletes (p>.05), but it was different for weight categories (p<.05). The ratio of shido penalty was different between winner and non-winner athletes, the ratio of the second shido was lower in winner athletes (p<.05). While the ratio of forbidden action was the same in winner and non-winner athletes (p>.05), the ratio of forbidden actions in the first and second shido differed (p<.05). The difference in the penalty ratios in winner and non-winner athletes, especially the difference in forbidden actions leading to first and second shido may reflect some tactical differences. The results of this research can significantly contribute to the understanding of the significance of judo penalties both in training and in competition, as well as to the further study of judo penalties.
Impact of time-of-day on judo-specific performance
(2022-07-17) Öztürk F.; Ceylan B.; Balci Ş.S.
In judo tournaments, matches for each weight category are held on the same day and athletes competing at the finals have to compete at different times of the day. This study aimed to investigate the effect of time-of-day on judo specific performance and the changes in physiological load following judo specific performance. Fourteen male judo athletes (age 19.1±1.4 years) voluntarily participated in the study. At the 1st visit, anthropometrical measurements and familiarization procedures were conducted and the athletes’ chronotype was determined. Athletes performed the Special Judo Fitness Test (SJFT) during 2nd and 3rd visits. Athletes randomly performed two consecutive SJFTs with 15 min intervals at 10:00h, which is the official start time of matches, and at 18:00h which is the time when the finals start. During SJFT applications, athletes heart rate (HR), blood lactate (bLA), body temperature and rate of perceived exertion (RPE) were monitored. The changes in total throw numbers (F1, 13= 1.32, p=0.27) and SJFT index (F1, 13= 0.30, p=0.59) were not different between morning and evening. There were similar changes in bLA (F4, 52=0.66, p=0.63), RPE (F1, 13=1.42, p=0.26) and body temperature (F1.4, 18.0=1.18, p=0.31) which were measured before and after the tests. However, HR measured in the evening were higher compared to morning measurement at all measurement times (F1, 13=10.28, p=0.01), but there was no difference in SJFT throws (F3.8, 48.8=0.49, p=0.74). In conclusion, different times of the day did not affect judo specific performance as well as physiological variables in judo athletes.
Penalties in judo: the impact of shido on match durations and results
(2020-07-03) Balci Ş.S.; Ceylan B.
The effects of penalties on match outcomes were investigated in this study. Data were obtained from a total of 5039 matches that included men, women, and all weight categories during the latest two world championships and eight different grand prix tournaments. The effects of shido on losing and factors affecting these penalties were determined with a binary logistic regression analysis. Receiving a shido during the match increased the possibility of losing (Odds ratio (OR)= 1.14). The possibility of defeat of the athletes who received the second shido was higher compared to those who did not (OR= 2.13). The possibility of penalisation with both first shido (OR= 1.86) and second shido (OR= 2.76) of defeated athletes was higher than winners. Each 1-minute increase in match duration increased possibility of receiving a shido (OR= 2.10, for first shido; OR= 1.87 for second shido). Despite current rule changes that aimed to decrease direct effects of penalties on match outcomes to create positive judo, receiving a shido was found to still significantly affect competitors’ techniques and tactics during the match and indirectly affect the match outcomes. Therefore, it is suggested that coaches and especially heavyweight athletes should evaluate the effects of shido on match tactics.