Jacques Abboud1, Arianne Lessard2, Martin Descarreaux2. 1. Department of Human Kinetics, Université du Québec À Trois-Rivières, 3351 Boul. des Forges, C.P. 500, Trois-Rivières, QC, G8Z 4M3, Canada. jacques.abboud@uqtr.ca. 2. Department of Human Kinetics, Université du Québec À Trois-Rivières, 3351 Boul. des Forges, C.P. 500, Trois-Rivières, QC, G8Z 4M3, Canada.
Abstract
PURPOSE: The lumbar region offers various muscle recruitment strategies to achieve a task goal under varying conditions. For instance, trunk movement control can be reorganized under the influence of low back pain. How such task-modulation is obtained is not fully understood. The objective of this study was to characterize superficial lumbar muscle recruitment strategies under the influence of delayed-onset muscle soreness (DOMS) during unexpected trunk perturbations. METHODS: Healthy participants experienced a series of 15 sudden external perturbations with and without the influence of low back DOMS. During these perturbations, high-density surface electromyography was used to characterize recruitment strategies of superficial lumbar muscles, while kinematics sensors were used to characterize movements of the trunk. Lumbar muscle recruitment strategies, characterized by the amplitude of muscle activity amplitude, the latencies of the reflex activity and the spatial distribution of muscle activity, were compared across perturbations trials and with and without DOMS. RESULTS: An attenuation of lumbar muscle activity amplitude was observed across perturbation trials without DOMS, but not with DOMS. The spatial distribution of muscle activity was similar with and without DOMS. No significant changes in reflex activity latency and trunk flexion movement were observed. CONCLUSIONS: Following an unexpected trunk perturbation under DOMS effects, trunk movement are controlled using two different superficial lumbar muscles control strategies: keeping a constant level of their overall muscle activity and using a variable muscle recruitment pattern.
PURPOSE: The lumbar region offers various muscle recruitment strategies to achieve a task goal under varying conditions. For instance, trunk movement control can be reorganized under the influence of low back pain. How such task-modulation is obtained is not fully understood. The objective of this study was to characterize superficial lumbar muscle recruitment strategies under the influence of delayed-onset muscle soreness (DOMS) during unexpected trunk perturbations. METHODS: Healthy participants experienced a series of 15 sudden external perturbations with and without the influence of low back DOMS. During these perturbations, high-density surface electromyography was used to characterize recruitment strategies of superficial lumbar muscles, while kinematics sensors were used to characterize movements of the trunk. Lumbar muscle recruitment strategies, characterized by the amplitude of muscle activity amplitude, the latencies of the reflex activity and the spatial distribution of muscle activity, were compared across perturbations trials and with and without DOMS. RESULTS: An attenuation of lumbar muscle activity amplitude was observed across perturbation trials without DOMS, but not with DOMS. The spatial distribution of muscle activity was similar with and without DOMS. No significant changes in reflex activity latency and trunk flexion movement were observed. CONCLUSIONS: Following an unexpected trunk perturbation under DOMS effects, trunk movement are controlled using two different superficial lumbar muscles control strategies: keeping a constant level of their overall muscle activity and using a variable muscle recruitment pattern.
Authors: Jacques Abboud; Catherine Daneau; François Nougarou; Claude Dugas; Martin Descarreaux Journal: J Neurophysiol Date: 2018-07-05 Impact factor: 2.714
Authors: Manuela Besomi; Paul W Hodges; Edward A Clancy; Jaap Van Dieën; François Hug; Madeleine Lowery; Roberto Merletti; Karen Søgaard; Tim Wrigley; Thor Besier; Richard G Carson; Catherine Disselhorst-Klug; Roger M Enoka; Deborah Falla; Dario Farina; Simon Gandevia; Aleš Holobar; Matthew C Kiernan; Kevin McGill; Eric Perreault; John C Rothwell; Kylie Tucker Journal: J Electromyogr Kinesiol Date: 2020-06-10 Impact factor: 2.368
Authors: Jacques Abboud; François Nougarou; Michel Loranger; Martin Descarreaux Journal: J Manipulative Physiol Ther Date: 2015-07-21 Impact factor: 1.437
Authors: Jacques Abboud; François Nougarou; Arnaud Lardon; Claude Dugas; Martin Descarreaux Journal: Front Hum Neurosci Date: 2016-11-14 Impact factor: 3.169