Shoulder Flexion Torque Is Augmented by a Volitional Abdominal Isometric Contraction

• Paul A. Cacolice ^[1] ; Christopher R. Carcia ^[2] ; Jason S. Scibek ^[3]
  1. [1] Westfield State University

     Westfield State University

     City of Westfield, Estados Unidos

     
  2. [2] Colorado Mesa University

     Colorado Mesa University

     Estados Unidos

     
  3. [3] Duquesne University

     Duquesne University

     City of Pittsburgh, Estados Unidos

     

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• Localización: Journal of strength and conditioning research: the research journal of the NSCA, ISSN 1064-8011, Vol. 35, Nº. 4, 2021, págs. 920-923
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • A stable core provides a solid base to facilitate effective extremity function. It is unclear whether an individual is able to produce a greater amount of upper extremity torque while performing a volitional core contraction when compared with the independent contraction that occurs subconsciously. Therefore, the purpose of this study was to determine whether peak shoulder flexion torque values were different with and without a concurrent volitional core isometric contraction. Thirty healthy, recreationally active college-aged students participated. Surface electromyography from the rectus abdominis (RA) was captured using a telemetry system interfaced with a software acquisition system and personal computer. In a counterbalanced alternating order, subjects completed 3 trials of maximal isometric shoulder flexion at 90[degrees] with and without a volitional abdominal contraction. Percent activation of the RA was greater when subjects volitionally contracted their core (15.8 +/- 12.7%) compared with the subconscious contracted condition (6.3 +/- 4.8%) (p <= 0.001). Isometric shoulder flexion peak torque was greater when the core was actively contracted (44.6 +/- 18.9 N x m) compared with when the core was recruited subconsciously (30.7 +/- 15.7 N x m) (p <= 0.001). These findings suggest the clinician should encourage the individual to activate their core musculature when performing upper extremity strength activities.