Grupo credenciado pela EEFE-USP em 2006. Participantes com (1) publicações de livros e artigos em periódicos nacionais e internacionais; (2) atuação na iniciação às modalidades ou com a preparação de atletas de diversos níveis. No 1o semestre de 2013, o foco central do grupo está direcionado para a conclusão de alguns projetos iniciados em 2012, bem como com o início da coleta de dados de alguns projetos de pesquisa.
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http://grupodestudoslutas.blogspot.com
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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)
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
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