The effect of muscle fatigue and low back pain on lumbar movement variability and complexity

Bauer, Christoph; Rast, F.M.; Ernst, M.J.; Meichtry, André; Kool, J.; Rissanen, S.M.; Suni, J.H.; Kankaanpää, M.

doi:10.1016/j.jelekin.2017.02.003

Publication type:	Article in scientific journal
Type of review:	Peer review (publication)
Title:	The effect of muscle fatigue and low back pain on lumbar movement variability and complexity
Authors:	Bauer, Christoph Rast, F.M. Ernst, M.J. Meichtry, André Kool, J. Rissanen, S.M. Suni, J.H. Kankaanpää, M.
DOI:	10.1016/j.jelekin.2017.02.003
Published in:	Journal of Electromyography and Kinesiology
Volume(Issue):	33
Page(s):	94
Pages to:	102
Issue Date:	2017
Publisher / Ed. Institution:	Elsevier
ISSN:	1050-6411 1873-5711
Language:	English
Subjects:	Fatigue; Low back pain; Movement disorders; Adult; Aged; Biomechanical Phenomena; Female; Humans; Low Back Pain; Lumbosacral Region; Middle Aged; Muscle; Movement; Muscle Fatigue; Skeletal
Subject (DDC):	616.7: Diseases of musculoskeletal system and orthopaedics
Abstract:	Introduction: Changes in movement variability and complexity may reflect an adaptation strategy to fatigue. One unresolved question is whether this adaptation is hampered by the presence of low back pain (LBP). This study investigated if changes in movement variability and complexity after fatigue are influenced by the presence of LBP. It is hypothesised that pain free people and people suffering from LBP differ in their response to fatigue. Methods: The effect of an isometric endurance test on lumbar movement was tested in 27 pain free participants and 59 participants suffering from LBP. Movement variability and complexity were quantified with %determinism and sample entropy of lumbar angular displacement and velocity. Generalized linear models were fitted for each outcome. Bayesian estimation of the group-fatigue effect with 95% highest posterior density intervals (95%HPDI) was performed. Results: After fatiguing %determinism decreased and sample entropy increased in the pain free group, compared to the LBP group. The corresponding group-fatigue effects were 3.7 (95%HPDI: 2.3-7.1) and -1.4 (95%HPDI: -2.7 to -0.1). These effects manifested in angular velocity, but not in angular displacement. Discussion: The effects indicate that pain free participants showed more complex and less predictable lumbar movement with a lower degree of structure in its variability following fatigue while participants suffering from LBP did not. This may be physiological responses to avoid overload of fatigued tissue, increase endurance, or a consequence of reduced movement control caused by fatigue.
URI:	https://digitalcollection.zhaw.ch/handle/11475/12385
Fulltext version:	Published version
License (according to publishing contract):	Licence according to publishing contract
Departement:	School of Health Sciences
Organisational Unit:	Institute of Physiotherapy (IPT)
Published as part of the ZHAW project:	„Valedo Movement Lab“: Das portable Bewegungslabor misst Bewegungs-Qualität bei unteren Rückenschmerzen
Appears in collections:	Publikationen Gesundheit

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Bauer, C., Rast, F. M., Ernst, M. J., Meichtry, A., Kool, J., Rissanen, S. M., Suni, J. H., & Kankaanpää, M. (2017). The effect of muscle fatigue and low back pain on lumbar movement variability and complexity. Journal of Electromyography and Kinesiology, 33, 94–102. https://doi.org/10.1016/j.jelekin.2017.02.003

Bauer, C. et al. (2017) ‘The effect of muscle fatigue and low back pain on lumbar movement variability and complexity’, Journal of Electromyography and Kinesiology, 33, pp. 94–102. Available at: https://doi.org/10.1016/j.jelekin.2017.02.003.

C. Bauer et al., “The effect of muscle fatigue and low back pain on lumbar movement variability and complexity,” Journal of Electromyography and Kinesiology, vol. 33, pp. 94–102, 2017, doi: 10.1016/j.jelekin.2017.02.003.

BAUER, Christoph, F.M. RAST, M.J. ERNST, André MEICHTRY, J. KOOL, S.M. RISSANEN, J.H. SUNI und M. KANKAANPÄÄ, 2017. The effect of muscle fatigue and low back pain on lumbar movement variability and complexity. Journal of Electromyography and Kinesiology. 2017. Bd. 33, S. 94–102. DOI 10.1016/j.jelekin.2017.02.003

Bauer, Christoph, F.M. Rast, M.J. Ernst, André Meichtry, J. Kool, S.M. Rissanen, J.H. Suni, and M. Kankaanpää. 2017. “The Effect of Muscle Fatigue and Low Back Pain on Lumbar Movement Variability and Complexity.” Journal of Electromyography and Kinesiology 33: 94–102. https://doi.org/10.1016/j.jelekin.2017.02.003.

Bauer, Christoph, et al. “The Effect of Muscle Fatigue and Low Back Pain on Lumbar Movement Variability and Complexity.” Journal of Electromyography and Kinesiology, vol. 33, 2017, pp. 94–102, https://doi.org/10.1016/j.jelekin.2017.02.003.