Dia Mundial do Judô

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Enseignement des sports de combat. Apprentissage utilisant

des mécanismes d’induction, apprentissage à la citoyenneté.... 259

Michel Calmet & Emerson Franchini

Conheça o International Taekwondo Research Consortium

http://itkdrc.blogspot.com/

Judô Brasileiro em Sheffield

http://sportv.globo.com/site/programas/sportv-news/noticia/2011/09/judo-brasileiro-escolhe-sheffield-como-quartel-general-na-inglaterra.html

Eletroestimulação e recuperação de atletas de judô

J Athl Train. 2011;46(4):386-94.


Comparison of recovery strategies on maximal force-generating capacity and electromyographic activity level of the knee extensor muscles.

Zarrouk N, Rebai H, Yahia A, Souissi N, Hug F, Dogui M.

Neurophysiologie de la Vigilance, de l'Attention et des Performances, Service d'Explorations Fonctionnelles du Système Nerveux, CHU Sahloul, Sousse, Tunisia;


Abstract
CONTEXT: With regard to intermittent training exercise, the effects of the mode of recovery on subsequent performance are equivocal.
OBJECTIVE: To compare the effects of 3 types of recovery intervention on peak torque (PT) and electromyographic (EMG) activity of the knee extensor muscles after fatiguing isokinetic intermittent concentric exercise.
DESIGN: Crossover study.
SETTING: Research laboratory. Patients or Other Participants: Eight elite judo players (age = 18.4 ± 1.4 years, height = 180 ± 3 cm, mass = 77.0 ± 4.2 kg). Intervention(s): Participants completed 3 randomized sessions within 7 days. Each session consisted of 5 sets of 10 concentric knee extensions at 80% PT at 120°/s, with 3 minutes of recovery between sets. Recovery interventions were passive, active, and electromyostimulation. The PT and maximal EMG activity were recorded simultaneously while participants performed isokinetic dynamometer trials before and 3 minutes after the resistance exercise. Main Outcome Measure(s): The PT and maximal EMG activity from the knee extensors were quantified at isokinetic velocities of 60°/s, 120°/s, and 180°/s, with 5 repetitions at each velocity.
RESULTS: The reduction in PT observed after electromyostimulation was less than that seen after passive (P < .001) or active recovery (P < .001). The reduction in PT was less after passive recovery than after active recovery (P < .001). The maximal EMG activity level observed after electromyostimulation was higher than that seen after active recovery (P < .05).
CONCLUSIONS: Electromyostimulation was an effective recovery tool in decreasing neuromuscular fatigue after high-intensity, intermittent isokinetic concentric exercise for the knee extensor muscles. Also, active recovery induced the greatest amount of neuromuscular fatigue.

http://docserver.ingentaconnect.com/deliver/connect/nata/10626050/v46n4/s8.pdf?expires=1317409023&id=64661649&titleid=41000054&accname=Guest+User&checksum=F32C1DAAE1C336CA7B101573E6AEB3C6

Manutenção dos resultados competitivos no judô

TRACKING 10-YEAR COMPETITIVE WINNING PERFORMANCE OF JUDO ATHLETES ACROSS AGE GROUPS1


URSULA F. JULIO, MONICA Y. TAKITO, LEANDRO MAZZEI, BIANCA MIARKA
School of Physical Education and Sport, University of São Paulo

STANISLAW STERKOWICZ
Department of Theory and Methodology of Combat Sports Academy of Physical Education in Krakow

EMERSON FRANCHINI
School of Physical Education and Sport University of São Paulo

Summary
Little information is available concerning early specialization and competitive success in judo across the early training years. Thus, the present objective was to verify the stability of individual competitive performance of a state-level championship for judo athletes who had been previously successful. For this, 406 athletes from six age groups (9 to 20+ years old) of each sex were followed for 10 years. Using recorded data from the São Paulo State Judo Federation beginning in 1999, the scores and standings for these judo players were analyzed. The proportion of medal winners during this period was not constant, differing from the grand mean in all groups of both 204 males and 202 females. At the end of this period, only 7% of the male and 5% of the female athletes had maintained their competitive levels. Successful competitive performance in early judo competition was not associated with success later in adulthood.

Hidratação em atletas de judô adolescentes

Int J Sports Physiol Perform. 2011 Aug 30. [Epub ahead of print]


Hydration Status in Adolescent Judo Athletes Before and After Training in the Heat.

Rivera-Brown AM, De Félix-Dávila RA.

Center for Sports Health and Exercise Sciences at the Albergue Olímpico, Department of Physical Medicine, Rehabilitation and Sports Medicine, University of Puerto Rico School of Medicine, San Juan, Puerto Rico.

Abstract
Adolescent judo athletes that 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 (PRE), immediately after (POST), and 24 hours 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 PRE, POST, and 24H 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 pre-training body mass while LP subjects lost 1.9 ± 0.5% (P < 0.05). 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.