Type de document
Études primaires
Année de publication
2019
Langue
Anglais
Titre de la revue
Journal of Orthopeadic & Sports Physical Therapy
Première page
262
Dernière page
271
Résumé
Abstract
Background: Two potential interventions for enhancing lumbar stability are to actively increase abdominal muscle activity, either through the abdominal drawing-in maneuver (ADIM) or bracing, and passively increase lumbar stiffness using a lumbosacral orthosis (LSO).
Objective: To compare the increase in lumbar stiffness after 2 active interventions (ADIM versus bracing) and 1 passive intervention (LSO), and to evaluate the combined effect of active (abdominal bracing) and passive interventions.
Methods: In this experimental and comparative study, lumbar stiffness, a surrogate measure of lumbar stability, was estimated in 25 healthy individuals during 7 trunk perturbation conditions: (1) control, (2) ADIM, (3) bracing at 5% of right external oblique maximal voluntary activation (5% bracing), (4) bracing at 10% of right external oblique maximal voluntary activation (10% bracing), (5) LSO, (6) LSO plus 5% bracing, and (7) LSO plus 10% bracing. Electromyographic biofeedback of the external oblique was provided on a monitor, while ultrasound was used for the ADIM to ensure a sustained contraction of the transversus abdominis.
Results: The ADIM, 5% bracing, and 10% bracing active interventions generated comparable lumbar stiffness. However, considering that bracing can range from 10% to 20%, it may be superior to hollowing, as further estimated with a mixed-effect statistical model. Combining bracing and an LSO resulted in an additive effect on lumbar stiffness.
Conclusion: Bracing and ADIM produced comparable lumbar stiffness, as they were performed at the same overall abdominal activation levels (5% and 10% maximal voluntary activation). The independent effects of bracing and LSO raises the possibility of combining these interventions in some circumstances.
Hyperlien
https://www.jospt.org/doi/10.2519/jospt.2019.8565
Mots-clés
Maux de dos, Backache, Lésion du tronc, Trunk injury, Affection dorsale, Back disorder, Mécanique humaine, Body mechanics, Troubles musculosquelettiques, Musculoskeletal disease, Recherche sur la douleur, Research on pain
Numéro de projet IRSST
n/a
Citation recommandée
Larivière, C., Boucher, J.-A., Mecheri, H. et Ludvig, D. (2019). Maintaining lumbar spine stability: A study of the specific and combined effects of abdominal activation and lumbosacral orthosis on lumbar intrinsic stiffness. Journal of Orthopaedic & Sports Physical Therapy, 49(4), 262-271. https://doi.org/10.2519/jospt.2019.8565