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Related Experiment Videos

Velocity-specific training in elbow flexors.

M Pousson1, I G Amiridis, G Cometti

  • 1Groupe Analyse du Mouvement, UFR STAPS, Université de Bourgogne, Dijon, France.

European Journal of Applied Physiology and Occupational Physiology
|September 14, 1999
PubMed
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Velocity-specific training enhanced elbow flexor strength at high speeds. This training reduced antagonist muscle coactivation, suggesting it may improve performance by lowering muscle inhibition.

Area of Science:

  • Biomechanics and Exercise Physiology
  • Neuromuscular Adaptations to Training

Background:

  • Muscle coactivation, involving both agonist and antagonist muscles, plays a crucial role in controlling movement and joint stability.
  • Understanding how specific training protocols influence coactivation patterns is essential for optimizing athletic performance and injury prevention.

Purpose of the Study:

  • To investigate the effects of velocity-specific resistance training on the coactivation levels of agonist (biceps brachii) and antagonist (triceps brachii) muscles.
  • To determine if enhanced maximal angular velocity is associated with changes in neuromuscular activation patterns.

Main Methods:

  • Healthy males underwent a 7-week unilateral resistance training program focusing on maximal angular velocity elbow flexion.
  • Measurements included isokinetic maximal elbow flexions at various velocities and electromyography (EMG) to quantify muscle activation (RMS) of biceps brachii and triceps brachii.

Related Experiment Videos

  • Constant angular torque (CAT) and muscle coactivation were assessed pre- and post-training.

    • Main Results:

    • Training significantly increased CAT at high velocities (240 and 300 degrees x s(-1)) by 18.7% and 23.5%, respectively.
    • Agonist (biceps brachii) muscle activation showed no significant changes.
    • Antagonist (triceps brachii) muscle normalized RMS amplitudes were significantly lower post-training, particularly at 300 degrees x s(-1), indicating reduced coactivation.

    Conclusions:

    • Velocity-specific training can enhance high-velocity torque production in elbow flexors.
    • The observed improvements in torque may be partly attributed to a reduction in antagonist muscle coactivation at higher speeds.
    • This suggests that velocity-specific training can modify neuromuscular strategies to optimize dynamic movement capabilities.