Browsing by Author "Balci, Sukru Serdar"

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    Changes in body mass and hydration status in judo athletes before and after a top-level competition: a descriptive case study.
    (2022-01-13T00:00:00Z) Ceylan, Bayram; Barley, Oliver R; Balci, Sukru Serdar
    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.
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    Pubmed
    Dehydration and Rapid Weight Gain Between Weigh-in and Competition in Judo Athletes: The Differences between Women and Men.
    (2021-10-25T00:00:00Z) Ceylan, Bayram; Balci, Sukru Serdar
    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; F = 71.81, p < 0.001), this increase was higher in men athletes compared to women athletes (time-sex interaction; F = 6.56, p = 0.01). With RWG, USG values of the women and men athletes decreased (time factor; F = 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, F = 2.9, p = 0.091; time-sex interaction; F= 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.
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    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.
    (2022-11-30T00:00:00Z) Ceylan, Bayram; Balci, Sukru Serdar
    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 XX(X): 000-000, 2022-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.