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http://www.ejmas.com/pt/2011pt/ptart_zaggelidis_1108.html
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Quem sou eu
- Emerson Franchini
- São Paulo, São Paulo, Brazil
- Professor da EEFE-USP; Praticante e Pesquisador de Judô; Preparador físico de atletas de modalidades esportivas de combate.
Arquivo do blog
- ► 2012 (168)
- ► 2011 (203)
quinta-feira, 6 de outubro de 2011
quarta-feira, 5 de outubro de 2011
Livro novo
des mécanismes d’induction, apprentissage à la citoyenneté.... 259
Michel Calmet & Emerson Franchini
domingo, 2 de outubro de 2011
sexta-feira, 30 de setembro de 2011
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
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
segunda-feira, 26 de setembro de 2011
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.
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.
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