PARADOXICAL EFFECTS OF PRACTICE OF FAST SINGLE-JOINT MOVEMENTS

dc.creatorALMEIDA, GL
dc.creatorLATASH, ML
dc.date1995
dc.dateNOV
dc.date2014-07-30T14:30:38Z
dc.date2015-11-26T16:32:12Z
dc.date2014-07-30T14:30:38Z
dc.date2015-11-26T16:32:12Z
dc.date.accessioned2018-03-28T23:13:32Z
dc.date.available2018-03-28T23:13:32Z
dc.identifierMedicine And Science In Sports And Exercise. Williams & Wilkins, v. 27, n. 11, n. 1540, n. 1549, 1995.
dc.identifier0195-9131
dc.identifierWOS:A1995TD42700011
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/59022
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/59022
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1270434
dc.descriptionWe studied the effects of extensive practice of fast, unidirectional, single-joint elbow flexions against a small extending torque bias upon the kinematic and electromyographic (EMG) characteristics of the movements as well as upon the reconstructed hypothetical control patterns (equilibrium trajectories). The subjects were tested at different distances, both with and without the bias torque prior to and after the practice sessions. The basic finding was paradoxical: The subjects did not improve their performance at the practiced task (against the bias) and at other distances in the same condition; however, they showed an increase in movement speed and a decrease in movement time al all distances in unpracticed conditions (without the bias). Changes in the EMG patterns were similar in both conditions. We hypothesize that the principle of learning the dynamics of interaction with the experimental setup in combination with a very steep learning curve form the basis for the observed paradoxical effects of practice. The equilibrium-point hypothesis of movement control provides the least controversial description of these effects as compared to the force-control and EMG-control approaches.
dc.description27
dc.description11
dc.description1540
dc.description1549
dc.languageen
dc.publisherWilliams & Wilkins
dc.publisherBaltimore
dc.relationMedicine And Science In Sports And Exercise
dc.relationMed. Sci. Sports Exerc.
dc.rightsfechado
dc.sourceWeb of Science
dc.subjectMOTOR CONTROL
dc.subjectMOTOR LEARNING
dc.subjectTRANSFER
dc.subjectEQUILIBRIUM-POINT
dc.subjectELECTROMYOGRAM
dc.subjectKINEMATICS
dc.subjectHUMAN
dc.subjectPrinciples
dc.subjectTask
dc.subjectPerformance
dc.subjectEquilibrium
dc.subjectGeneration
dc.subjectBehavior
dc.subjectModel
dc.subjectEmg
dc.titlePARADOXICAL EFFECTS OF PRACTICE OF FAST SINGLE-JOINT MOVEMENTS
dc.typeArtículos de revistas


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