Browsing by Author "Ceylan B."

Now showing 1 - 20 of 24

Acute Dehydration Impairs Performance and Physiological Responses in Highly Trained Judo Athletes
(2022-06-01) Ceylan B.; Kons R.L.; Detanico D.; Šimenko J.
Background: The present study investigated highly trained male judo athletes and how a 5% body mass dehydration affects their judo-specific performance and physiological responses. Meth-ods: Nine highly trained international-level male judo athletes who are weight-cyclers voluntarily participated in the study. The study had a controlled crossover design in nature. Athletes com-pleted three sessions, including a familiarisation session and two experimental sessions (dehydration (DEHY) and control (CON)) with judo-specific tests, including maximal handgrip strength test (HGS), judogi grip strength tests (JGST), and the Special Judo Fitness Test (SJFT). Results: Intergroup analysis revealed a significant increase in urine specific gravity (USG) and decreased body mass following DEHY condition compared to CON. Furthermore, significant decreases were determined in HGS, JGSTs, and a number of throws in the first and third series of SJFTs, as well as higher heart rate (HR) responses in the second and third series of SJFT and worse SJFT index in DEHY condition (p < 0.05). Conclusions: We concluded that 5% dehydration of body mass led to impairment in dynamic and isometric strength in upper limbs and in judo-specific performance, as well as elevated HR during the SJFT.
Analysis of video review during official judo matches: effects on referee’s decision and match results
(2021-01-01) Kons R.L.; Saldanha Da Silva Athayde M.; Ceylan B.; Franchini E.; Detanico D.
This study aimed to describe the frequency of video review (VR) used during international judo matches. The duration and time of VR occurrence and the effect of VR on subsequent referee’s decisions and match outcomes were investigated. Video recordings from the matches in which the VR was used in the 2020 Grand Slams (n = 122) were analysed. The main results showed most VR occurrences were from 1 to 2 min for female athletes (p = 0.03). Lightweight categories in both male and female groups showed the highest frequency of VR (37.3%). No significant differences were detected for VR duration and time when VR occurred considering sex and weight categories (p = 0.91, p = 0.26, respectively). A significant association was found between the type of action and the referee’s decision (p < 0.01), being score assignment the most frequent action (77.6% of male and 64.8% of female). More than 80% of the athletes (82.3% male and 78.3% female) won their matches after referees’ checking. We concluded that VR is often used at the beginning of the match mainly in the female group, mostly concerning scoring attribution, which directly affected the match result in more than 80% of the cases.
Anthropometric profile, Wingate performance and Special Judo Fitness Levels of Turkish Olympic Judo Athletes
(2018-01-01) Ceylan B.; Gurses V.; Akgul M.; Baydil B.; Franchini E.
Background. Judo is an Olympic sport where physical fitness is of great importance as well as technique and tactics. Physical and physiological conditions of the athletes are very important for a better judo performance and there is still a need for more data related to these determinants. Problem and aim. There is a need for more data concerning anthropological determinants of judo athletes. Thus, the aim of this study was to evaluate anthropometric profile, Wingate and Special Judo Fitness Test (SJFT) performance. Methods. The following tests and measurements were conducted in order to investigate anthropometric profile, Wingate and Special Judo Fitness Test (SJFT) performance of male (n=7) and female (n=10) judo athletes from Turkish Olympic judo team: anthropometric measurements, Wingate anaerobic test (WanT) and SJFT. An independent Student t test was used to compare male and female athletes. Pearson product correlation was used to verify the relationship between variables. Effect sizes were calculated following the recommendations by Rhea (2004). Results. There were differences between male and female athletes in the following variables; fat-free mass, body fat percentage, peak and mean power, HR after the set A and in the SJFT index (p < 0.05).Large and very large correlations were found between anthropometric measurements, SJFT parameters and WanT performance results (p < 0.01). Large correlation was found between fat-free mass and HR values during SJFT sets (p < 0.05). Conclusions. It can be concluded that the higher the fat percentage, the lower is the performance in activities involving body displacement. In conclusion, sex and weight differences should be taken into consideration while evaluating judo athletes and because higher fat-free mass means better SJFT performance, the training program should be organized to decrease or maintain body fat and increase muscle mass.
Changes in body mass and hydration status in judo athletes before and after a top-level competition: a descriptive case study
(2022-01-01) Ceylan B.; Barley O.R.; Balci S.S.
Objectives: The International Judo Federation (IJF) implemented new regulations in an attempt to regulate rapid weight loss in 2013. The body weight of the athletes cannot be more than 5% higher than the upper limits of their weight categories at the weight check for randomly selected athletes from each weight category before the competition. However, therea lack of studies demonstrating rapid weight loss and hydration status of elite judo athletes in a real match atmosphere under the current refereeing rules. Thus, this study aimed to examine the body mass and hydration changes of elite judo athletes a week before the competition, official weigh-in, and 24 hours after competition. Methods: Eight high-level male judo athletes voluntarily participated in this study. Body mass and urinary measures of hydration status were collected a week before, at the official weigh-in and 24-hour post-weigh-in. Results: The one-way repeated-measures ANOVA showed a significant main effect of time on body mass (p < 0.001). Body mass decreased by 5.4 ± 0.7 kg or 6.8% from a week before the competition to official weigh-in (p < 0.001) and increased by 3.0 ± 1.1 kg or 4.2% from official weigh-in to 24-h post-competition (p < 0.001). A significant effect of time was also found in both urine-specific gravity (USG) (p < 0.001) and urine color (UC) among the measurements (p = 0.001). Athletes’ USG values were at the highest level (USG = 1.030 ± 0.001) at the official weigh-in, while they decreased significantly at 24-hour post-competition (USG = 1.017 ± 0.007). Conclusion: The results showed that elite judo athletes resort to rapid weight loss and present dehydration despite established regulations by the IJF.
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.
Dehydration and acute weight gain of athletes before sport competitions
(2018-01-01) Gurses V.V.; Ceylan B.; Sakir M.; Baydil B.; Hussein H.A.; Badau D.
The aim of this study was to evaluate the extent of acute weight gain, dehydration and rehydration in judo athletes before official competitions. The results showed that judo athletes are competing in dehydrated conditions and thus preventive measurements should be taken to prevent athletes’ disadvantageous health circumstances related to acute weight gain and dehydration.
Dehydration and Rapid Weight Gain Between Weigh-in and Competition in Judo Athletes: The Differences between Women and Men
(2021-01-01) Ceylan B.; Balci S.S.
This study aimed to investigate the sex differences in short-term weight change and hydration status in judo athletes. Thirty-five men and 15 women judo athletes voluntarily participated in this descriptive and repeated measures design study. Body mass, urine-specific gravity (USG), and body composition of the athletes were measured at the official weigh-in and the competition day’s morning. Body mass of the athletes increased during recovery time between official weigh-in and before the competition (time factor; F1-48 = 71.81, p < 0.001), this increase was higher in men athletes compared to women athletes (time-sex interaction; F1-48 = 6.56, p = 0.01). With RWG, USG values of the women and men athletes decreased (time factor; F1-48 = 8.53, p = 0.005). However, most of the athletes were still in significant or serious dehydration state. Unchanged values of total body water rates (TBW) supported dehydration in athletes before the competition (time factor, F1-48 = 2.9, p = 0.091; time-sex interaction; F1-48= 2.4, p = 0.122). The findings of the study indicated that RWG was higher in men athletes compared to women athletes, but hydration status was not affected by sex factor.Notwithstanding 15 hours of recovery between official weigh-in and the start of the competition, judo athletes were still in dehydrated state despite remaining within the limit set for RWG.
Effect of Ischemic Preconditioning on Acute Recovery in Elite Judo Athletes: A Randomized, Single-Blind, Crossover Trial
(2023-02-01) Ceylan B.; Taşkın H.B.; Šimenko J.
PURPOSE: The ischemic preconditioning (IPC) method has been shown to aid the recovery processes; however, no studies have been done to assess its acute recovery use in judo. This study aimed to examine IPC of lower limbs effects on recovery after a judo-specific performance in highly trained male judokas and its applicability during a competition day. METHODS: A single-blind, placebo-randomized crossover study was carried out on a sample of 13 elite male judo athletes. They undertook measurements of body composition, judo-specific task (Special Judo Fitness Test), jump performance, handgrip strength, lactate, blood pressure, perceived exertion, and delayed-onset muscle soreness. IPC was applied on the legs and inflated 50 mm Hg above the systolic blood pressure for 5 minutes and repeated 3 times for each leg, with 5 minutes of reperfusion. Two-way analysis of variance with repeated measurements was used to determine changes between interventions and measurement times. Paired-sample t test and 1-way repeated-measures analysis of variance was used to determine the difference among measurement times. Statistical significance was set at P < .05. RESULTS: The IPC intervention resulted in (1) decreased heart rate at 30 and 60 minutes during recovery (P = .002; P = .001), (2) better countermovement jump performance at 60 minutes (P = .05), (3) lower perceived-muscle-soreness scores (P = .006), and (4) maintained handgrip strength compared with placebo. CONCLUSIONS: The present study revealed that IPC applied to judo athletes following judo-specific exercise resulted in better cardiovascular and neuromuscular recovery and could be a useful tool to enhance recovery during judo competition breaks between preliminaries and final block.
Effect of Rapid Weight Loss on Hydration Status and Performance in Elite Judo Athletes
(2022-04-01) Ceylan B.; Aydos L.; Šimenko J.
Background: This study aimed to investigate the effect of 5% rapid weight loss on hydration status and judo performance in highly trained judo athletes. Methods: Eighteen male judo athletes participated in the study and were divided into two groups: control and rapid weight loss (RWL). RWL athletes were given 48 h to cut 5% of their body mass while the control group followed their routines. Athletes performed three measurements, including hydration, body mass and three consecutive special judo fitness tests (SJFTs). At the 1st and 6th minutes following each SJFT and 1st, 6th and 15th minutes following the last SJFT, blood lactate and heart rate (HR) was monitored. Results: The effect of RWL on variables was tested with split‐plot ANOVA. RWL significantly affected urine specific gravity with a higher value following weight loss compared to baseline and recovery (F2‐32 = 13.2, p < 0.001). In addition, athletes’ SJFT total throw numbers differed among measurements (F2‐32 = 7.70, p < 0.001). Athletes presented worse SJFT index after weight loss (F2‐ 32 = 8.05, p = 0.01; F1‐16 = 6.43, p = 0.02, respectively). HR changed significantly among measurements days and times (F28‐448 = 143.10, p < 0.001). Conclusion: RWL induced dehydration and impaired heart rate recovery in highly trained judo athletes, and they could not rehydrate between competition simulated weigh‐in and 15 h of recovery.
Fluid intake, hydration status and body mass changes in U-15 judo athletes during a training day
(2022-01-01) Ceylan B.; Santos L.
Despite numerous studies related to dehydration there is still a lack of scientific literature presenting hydration status and fluid intake of judo athletes during different periods. Therefore, the aim of this study was to investigate, fluid intake, hydration status and body weight changes of young judo athletes during a typical day of training in preparation period. Twenty-two young judo athletes (age: 12 ± 0.7 y, experience: 3.5 ± 1.1) voluntarily participated in this study. Hydration status and weight were examined in the morning, before and immediately after the training. All athletes trained 90 min and they consumed fluids ad libitum during the exercise. According to morning urine specific gravity (USG) values, 81.2% of the athletes were dehydrated while only 18.8% of the athletes were euhydrated. Pre-training urine measurements showed that 63.64% of the athletes presented dehydration and 77.27% of the athletes completed the training in dehydrated condition despite fluid availability during the training. Mean body weight loss during training was-0.64 ± 0.66%. It can be concluded that young judo athletes presented high prevalence of dehydration as indicated by USG values. Most of the athletes were dehydrated during a typical training day and completed the training in more dehydrated conditions compared to pre training values despite ad libitum fluid intake. It is of great importance to evaluate hydration status of the athletes before training to refrain from common practice of fluid restriction for weight loss and adverse effects of a persistent state of fluid deficit on physical and health related state.
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.
Habit or lack of education? Hypohydration is present in elite senior judo athletes even during a weight-stable training camp
(2022-01-01) Ceylan B.; Taşcan M.B.; Simenko J.; Balcı Ş.S.
It has been well-documented that high-level judo athletes presented a high level of hypohydration during weight-cutting and competition periods. However, there is a lack of studies investigating the hydration status of high-level judo athletes during a weight-stable training period. Therefore, this study aimed to investigate elite judo athletes’ hydration status, body mass change, and fluid intake during a weight-stable training camp. Twenty-seven judo athletes (women n = 8, men n = 19, body weight = 79.6 ± 20.9 kg) from the senior national judo team voluntarily participated in this study. Data were collected in the morning after waking up and before and after the morning and evening training sessions. On the second day, the measurements were taken again in the morning after waking up. Urine-specific gravity (USG) was classified as hydrated (USG < 1.020) and hypohydrated (USG ≥ 1.020). The athletes’ USG values measured on two consecutive mornings increased (1.025 ± 0.007 to 1.029 ± 0.006) during 24 h, in which athletes performed judo training in the morning and evening. Moreover, sex and weight category did not affect the changes in USG values (p >.05). Most of the elite judo athletes presented hypohydration (92.6%). The relationship between the fluid intake of the athletes and the changes in USG and body weight values during 24 h was not significant (p >.05). The current study’s findings revealed that high-level judo athletes present a high level of hypohydration even during a weight-stable training camp. Furthermore, the training sessions during the experiment period (24 h) worsened the hydration status of the senior athletes in all weight categories for both women and men.
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.
Ischemic preconditioning does not improve judo-specific performance but leads to better recovery in elite judo athletes
(2022-06-01) Ceylan B.; Franchini E.
Objectives: Although there are numerous studies related to effect of ischemic preconditioning on performance, there is a lack of studies demonstrating the effect of ischemic preconditioning on sport specific performance and recovery. Thus, this study aimed to demonstrate the effects of ischemic preconditioning on judo-specific performance and recovery. Equipment and methods: Ten men elite judo athletes (age = 20.0 years ± 2.2, judo experience = 9.6 years ± 1.9) voluntarily participated in this study. A controlled single-blinded crossover design was used to assess the effect of ischemic preconditioning on judo-specific performance and recovery. Athletes executed three test sessions including familiarization, ischemic preconditioning and control conditions. In each session, they executed the special judo fitness test. Heart rate was measured before, immediately after and 1, 3, 5 and 10 min, whereas blood lactate concentration was measured before and 3, 5, 10 min after the judo specific test. Oxygen saturation and blood pressure were monitored during ischemic preconditioning application. Results: No difference was found concerning the oxygen saturation during the ischemic pre-conditioning (P > 0.05). Heart rate and lactate responses in control condition were higher compared to ischemic preconditioning condition (P < 0.01). Systolic blood pressure also differed across moments of measurement during judo specific test (P < 0.01). No effect of condition was found for number of throws and index during judo specific test. Ischemic preconditioning has no impact on judo specific performance, but resulted in lower heart rate and lactate concentration, further studies are warranted to investigate effect of ischemic preconditioning on recovery in judo athletes during a competition day or following judo-specific activities.
Match duration during high-level judo competitions: Golden score or not?
(2022-01-01) Ceylan B.; Ozturk F.; Balci S.S.
Background. Recent rule changes have led to alterations in the technical and tactical components of judo matches and athletes’ physical capacities. There have also been many changes regarding total match durations during high-level judo matches. Problem and aim. There is no study under the current refereeing rules that investigates both total match duration, and the factors leading to the competition continuing after the golden score. This study investigated the factors that affected total match duration during high-level judo matches. Methods. The data were obtained from a total of 5111 official judo matches during the latest two world championships (2018– 2019) and eight grand prix tournaments (2019). The Mann-Whitney-U test was used to determine the difference in total match duration between men and women, while differences among the weight categories were investigated using the Kruskal-Wallis test. The difference in the percentage of matches with or without a golden score according to weight categories was analysed by the Chi-square test. The factors leading to a match ending in a golden score were investigated using logistic binary regression analysis. Results. The total match duration decreased as the weight categories in both men and women increased. Likewise, increasing the weight category led to an increase in the percentage of t matches that ended before the official time and a decrease in normal match duration and matches that ended in the golden score. Sex did not affect this distribution. The possibility of a golden score in other weight categories was 2-3 times higher compared to heavyweight classes (OR=1.77-2.84, p=0.00). The lack of ippon score in the matches significantly increased the possibility of a golden score (OR=1.53, p=0.00). The possibility of a third waza-ari (2 vs 1) during a golden score was 3 times higher compared to the matches that ended before the official match duration (OR=3.12, p=0.00). Moreover, a waza-ari increased the possibility of matches ending before or at normal match duration by1.3 times while two waza-ari increased it by 5.54 times. The possibility of a golden score in the matches with a shido was higher compared to those without a shido. This possibility increased more as long as the number of penalties increased. Conclusions. The total duration of the matches was affected by weight categories, the number of scores, and penalties. In particular, receiving a shido was found to be an important factor in terms of a longer match duration. The increase in weight categories led to a shorter match duration. The investigation of the match duration and the factors affecting it within the current refereeing rules can contribute to coaches and athletes developing training plans and match tactics.
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.
The comparison of judo-specific tests
(2018-01-01) Ceylan B.; Balci S.S.
Background. There are some judo-specific performance tests developed in recent years. It has been reported that these tests present the same physiological results as aerobic and anaerobic power measurements carried out in laboratories. Measurements carried out by using judo-specific exercises are important to control the development of the training. Problem and aim. The aim of this study was to determine whether 3 different judo-specific tests could discriminate judo athletes from different levels and present the same physiological results as simulated judo match. Methods. Eight male judo athletes who have competed in international competitions in the recent year and 7 male judo athletes who have competed in national competitions in the recent year voluntarily participated in this study. During the selection process, some criteria such as at least 4-year judo background, attending trainings regularly and no injuries in the recent year which adversely affected athletes' training program were taken into consideration. Athletes carried out 4 different practices (tests): Special Judo Fitness Test (SJFT), Uchikomi Fitness Test (UFT), Santos Test (ST) and Simulated Judo Match (SJM). Tests were carried out randomly at the same time of the day with at least 2, at most 3 days intervals. Rest values of hearth rate (HR) and lactate (LA) were measured before tests and at 1st, 5th, 10th, 15th, 30th minutes of the recovery period. Paired comparisons of the variables were tested with independent sample t-test, changes in HR and LA values in both groups were tested with the three-factor mixed-design analysis of variance with repeated measurement. Results. Elite and non-elite athletes were found to have the same physical characteristics except body fat percentage. Time of measurement (F = 187.57) and tests (F = 21.05) significantly affected the level of lactate (p < 0.05), the interaction effect between test and time factors was also found significant (F = 8.80; p < 0.05). Contrarily, changes of the lactate concentration during the tests were similar in elite and non-elite judo athletes (F = 0.82; p < 0.05). Conclusion. Despite similar changes in HR and LA only SJFT and ST discriminated elite and non-elite judo athletes in terms of number of throws and test-specific evaluations while UFT did not discriminate the levels of the athletes.
The Effects of Various Work-to-Rest Ratios During High-Intensity Intermittent Exercises on Uchi-Komi Performance and Postexercise Heart Rate and Blood Lactate in Judo Athletes
(2023-06-01) Ceylan B.; Balci S.S.
ABSTRACT: Ceylan, B and Balci, SS. The effects of various work-to-rest ratios during high-intensity intermittent exercises on uchi-komi performance and postexercise heart rate and blood lactate in judo athletes. J Strength Cond Res 37(6): 1231-1236, 2023- Uchi-komi exercises are the most important component of judo training. This study aimed to investigate the effect of different rest intervals during high-intensity intermittent uchi-komi exercises on total technique repetitions and physiological load in judo athletes. Twenty-two male judo athletes (mean age 19.0 ± 1.2 years, judo experience 7.6 ± 22.7 years) voluntarily participated in this study. Athletes' body composition and judo-specific performance were determined. The athletes randomly performed 20 seconds × 8 sets of high-intensity intermittent exercise using ippon-seoi-nage technique with 1:1/2, 1:1, 1:2, and 1:3 work-to-rest ratios on separate days. Before and 1, 7, 15, and 30 minutes after each exercise, athletes' heart rate (HR) and blood lactate were determined. The number of repetitions differed according to rest durations, when the rest duration decreased, the number of the repetitions decreased ( F21, 441 = 7.09, p < 0.001). Blood lactate responses were similar during the exercises with different rest intervals ( F3,63 = 2.15, p = 0.10). The shorter the rest duration, the higher the HR ( F3,63 = 6.81, p < 0.001). The current study proposed that 1:2 and 1:3 work-to-rest ratios at high-intensity intermittent uchi-komi exercise are the most appropriate intervals to ensure a high number of technique repetitions and the continuity of the training.
The impact of penalties on attack frequency in high-level judo matches
(2023-01-01) Ceylan B.; Balcı Ş.S.; Taşkın H.B.; Santos L.
This study aimed to determine the effect of penalties on attack frequency in high-level judo matches. The study investigated 194 matches (74 women’s and 120 men’s matches) where at least one of the two competitors received the second shido. The penalties affected the attack frequency (F 2, 360 = 30.81, p < 0.001). The attack frequency was the highest after the second shido, while it was the lowest before athletes were penalised with the first shido. The increase in nage-waza attack frequency increased the possibility of winning a match twice (odds ratio (OR) = 2.01), and the increase in the number of ne-waza attacks per minute increased the possibility of winning a match 3 times (OR = 3.13). Moreover, the increase in the attack frequency especially following the second shido significantly increased the possibility of winning compared to previous penalties (OR = 1.13). Thus, the current study concludes that penalties affect match dynamics, and the change in the number and frequency of attacks affects match outcome. It is suggested that athletes should perform positive activities to increase the possibility of winning. Coaches could plan tactical trainings by taking the number of penalties into account.
The penalties and scores by events, to predict victory and defeat according to when the contest ends in elite judo contests
(2024-07-15) Dopico-Calvo X.; Santos L.; Mayo X.; Carballeira E.; Clavel I.; Ceylan B.; Kons R.L.; Iglesias-Soler E.