Effects of resistance training on force steadiness and common drive

• Published in: Muscle & nerve Vol. 43; no. 2; pp. 245 - 250
• Main Authors: Beck, Travis W., DeFreitas, Jason M., Stock, Matt S., Dillon, Michael A.
• Format: Journal Article
• Language: English
• Published: Hoboken Wiley Subscription Services, Inc., A Wiley Company 01.02.2011; Wiley
• Subjects: Action Potentials - physiology; Adolescent; Adult; Analysis of Variance; Biological and medical sciences; decomposition; Drive; Ear, auditive nerve, cochleovestibular tract, facial nerve: diseases, semeiology; electromyography; Electromyography - methods; force; Fundamental and applied biological sciences. Psychology; Humans; isometric; Isometric Contraction - physiology; Leg - innervation; Male; Medical sciences; motor control; Motor control and motor pathways. Reflexes. Control centers of vegetative functions. Vestibular system and equilibration; Muscle Strength - physiology; Non tumoral diseases; Otorhinolaryngology. Stomatology; Quadriceps Muscle - physiology; Resistance Training - methods; Statistics as Topic; Vertebrates: nervous system and sense organs; Young Adult; Human; Nervous system diseases; Program; Force; isometric; Electrophysiology; Lower limb; Action potential; decomposition; Bipolar signal; Motor control; Equilibrium disorder; ENT disease; Electromyography; Muscle; Deviation
• ISSN: 0148-639X; 1097-4598
• DOI: 10.1002/mus.21836

The purpose of this study was to investigate the influence of an 8‐week resistance training program on force steadiness and common drive for the vastus lateralis muscle. Eight untrained men performed a resistance training program. Before the program and at the end of each week, the subjects performed a trapezoid isometric muscle action of the leg extensors, and bipolar surface electromyographic signals were recorded from the vastus lateralis. The signals were decomposed into action potential trains that were cross‐correlated to measure common drive. Force steadiness was quantified as the standard deviation of force during the constant‐force portion of the trapezoid muscle action. The training program did not consistently affect force steadiness or common drive for any of the subjects. Although future studies are needed with different muscles and training programs, changes in the overall motor control scheme are not likely with resistance training. Muscle Nerve 43: 245–250, 2011