Comparison of Recovery Strategies on Maximal Force-Generating Capacity and Electromyographic Activity Level of the Knee Extensor Muscles.

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    • Subject Terms:
      KNEE physiology; TORQUE; QUADRICEPS muscle physiology; ANALYSIS of variance; ANTHROPOMETRY; CLINICAL trials; CROSSOVER trials; ELECTRIC stimulation; ELECTROMYOGRAPHY; EXERCISE physiology; EXERCISE tests; FATIGUE (Physiology); ISOKINETIC exercise; RANGE of motion of joints; MARTIAL arts; MUSCLE contraction; MUSCLE strength; MUSCLES; STATISTICAL sampling; STATISTICS; DATA analysis; COOLDOWN; PRE-tests & post-tests; CONTINUING education units; REPEATED measures design; DATA analysis software
    • Subject Terms:
      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 1207s, 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 af- ter the resistance exercise. Main Outcome Measure(s): The PT and maximal EMG activity from the knee extensors were quantified at isokinetic velocities of 607s, 1207s, and 1807s, with 5 repetitions at each velocity. Results: The reduction in PT observed after electromyo- stimulation 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 fatique. [ABSTRACT FROM AUTHOR]
    • Abstract:
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