[article] in Journal of Orthopaedic & Sports Physical Therapy > vol. 47, 11 (Novembre 2017) . - p.853-862 Titre : | Balance Training Enhances Motor Coordination During a Perturbed Sidestep Cutting Task | Type de document : | article de périodique | Auteurs : | Anderson-Souza Oliviera, Auteur ; [et al.], Auteur | Année de publication : | 2017 | Article en page(s) : | p.853-862 | Langues : | Anglais (eng) | Descripteurs (mots clés) : | [Thésaurus Mesh]:E:Électromyographie:Électromyographie / utilisation [Thésaurus Mesh]Articulation du genou [Thésaurus Mesh]Électromyographie
| Résumé : | Controlled laboratory study.
Background
Balance training may improve motor coordination. However, little is known about the changes in motor coordination during unexpected perturbations to postural control following balance training.
Objectives
To study the effects of balance training on motor coordination and knee mechanics during perturbed sidestep cutting maneuvers in healthy adults.
Methods
Twenty-six healthy men were randomly assigned to a training group or a control group. Before balance training, subjects performed unperturbed, 90° sidestep cutting maneuvers and 1 unexpected perturbed cut (10-cm translation of a movable platform). Participants in the training group participated in a 6-week balance training program, while those in the control group followed their regular activity schedule. Both groups were retested after a 6-week period. Surface electromyography was recorded from 16 muscles of the supporting limb and trunk, as well as kinematics and ground reaction forces. Motor modules were extracted from electromyography by nonnegative matrix factorization. External knee abduction moments were calculated using inverse dynamics equations.
Results
Balance training reduced the external knee abduction moment (33% ± 25%, P<.03, ηp2 = 0.725) and increased the activation of trunk and proximal hip muscles in specific motor modules during perturbed cutting. Balance training also increased burst duration for the motor module related to landing early in the perturbation phase (23% ± 11%, P<.01, ηp2 = 0.532).
Conclusion
Balance training resulted in altered motor coordination and a reduction in knee abduction moment during an unexpected perturbation. The previously reported reduction in injury incidence following balance training may be linked to changes in dynamic postural stability and modular neuromuscular control | Permalink : | https://bibliotheque.helb-prigogine.be/opac_css/index.php?lvl=notice_display&id= |
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