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Bianca Miarka, Katarzyna Sterkowicz-Przybycien and David H. Fukuda

Coordinative movement skills in judo refer to the ability of an individual athlete to perform a suitable action at the correct moment while quickly adapting to the constantly fluctuating competitive environment ( Miarka, Branco, Vecchio, Calmet, & Franchini, 2015 ). Notational analysis is concerned

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Tyler W.D. Muddle, David H. Fukuda, Ran Wang, Joshua J. Riffe, David D. Church, Kyle S. Beyer, Jay R. Hoffman and Jeffrey R. Stout

, Lech, Jaworski, & Ambrozy, 2012 ). Typically, judo bouts occur in the vertical position ( Franchini & Sterkowicz, 2000 ), requiring athletes to adapt their posture quickly in reaction to combat situations. This is particularly important when performing techniques used during practice or competition

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Anita M. Rivera-Brown and Roberto A. De Félix-Dávila

Adolescent judo athletes who train in tropical climates may be in a persistent state of dehydration because they frequently restrict fluids during daily training sessions to maintain or reduce their body weight and are not given enough opportunities to drink.

Purpose:

Determine the body hydration status of adolescent judo athletes before, immediately after, and 24 h after (24H) a training session and document sweat Na+ loss and symptoms of dehydration.

Methods:

Body mass and urine color and specific gravity (USG) were measured before, after, and 24 h after a training session in a high-heat-stress environment (29.5 ± 1.0°C; 77.7 ± 6.1% RH) in 24 adolescent athletes. Sweat sodium loss was also determined. A comparison was made between mid-pubertal (MP) and late pubertal (LP) subjects.

Results:

The majority of the subjects started training with a significant level of dehydration. During the training session, MP subjects lost 1.3 ± 0.8% of their pretraining body mass whereas LP subjects lost 1.9 ± 0.5% (P < .05). Sweat sodium concentration was 44.5 ± 23.3 mmol/L. Fluid intake from a water fountain was minimal. Subjects reported symptoms of dehydration during the session, which in some cases persisted throughout the night and the next day. The 24H USG was 1.028 ± 0.004 and 1.027 ± 0.005 g/mL for MP and LP, respectively.

Conclusions:

Adolescent judo athletes arrive to practice with a fluid deficit, do not drink enough during training, and experience symptoms of dehydration, which may compromise the quality of training and general well-being.

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Vinícius Y.B. Suetake, Emerson Franchini, Bruna T.C. Saraiva, Anne K.F. da Silva, Aline F.B. Bernardo, Rayane L. Gomes, Luiz Carlos M. Vanderlei and Diego G.D. Christofaro

mentioned, there is a need for research in the field of martial arts as a method of exercise for health prevention/promotion. Moreover, it is not clear in the literature if grappling (judo) and striking martial arts (Muay Thai) exert the same influence on HRV in children and adolescents. It is noteworthy

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Christina Yannetsos, Mario C. Pacheco and Danny G. Thomas

Key Points ▸ There is a widespread underreporting of concussion in athletes. ▸ Red-flag symptoms were often mistaken for common concussive symptoms by judo coaches. ▸ Coaches’ concussion education, judo equipment, and legislature are potential areas of improvement. Sport-related concussion has an

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Simone Ciaccioni, Laura Capranica, Roberta Forte, Helmi Chaabene, Caterina Pesce and Giancarlo Condello

behaviors in the life span, enjoyment emerged as one of the main determinants in older people ( Biddle, Mutrie, & Gorely, 2015 ). In fact, leisure-time aerobic PA (e.g., walking, cycling, swimming) and organized senior sports (e.g., rowing, soccer, tennis, judo) are emerging phenomena, widely popular among

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Reid Reale, Gary Slater and Louise M. Burke

All Olympic combat sports (currently, judo, taekwondo, boxing, and wrestling) separate athletes by body mass (BM) into “weight” divisions to minimize size/strength disparities. To ensure athletes meet weight requirements, official weigh-ins are held before competition. In addition to reducing body

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Jose Morales, Carla Ubasart, Mónica Solana-Tramunt, Israel Villarrasa-Sapiña, Luis-Millán González, David Fukuda and Emerson Franchini

Olympic combat sports (ie, wrestling, boxing, judo, taekwondo, and karate) separate athletes into weight categories to promote equal competitive conditions among contestants and to reduce the risk of injuries. 1 However, weight categorization may result in an advantage for those contestants who

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Rafael L. Kons, Kai Krabben, David L. Mann, Gabriela Fischer and Daniele Detanico

Judo for athletes with vision impairment (VI judo) is a Paralympic sport that follows the same rules as Olympic judo but with one main exception, as the match is initiated with athletes positioning their grips on the opponents’ jacket ( judogi ; International Paralympic Committee, 2018 ). This

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Seihati A. Shiroma, Ursula F. Julio and Emerson Franchini

Judo is considered an intermittent combat sport, whose effort periods vary between 20 and 30 seconds and are interspersed by 10-second pause periods. 1 The scoring actions during the judo match are dependent mainly on the anaerobic metabolism 1 , 2 ; however, the oxidative system contributes to