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.
Published in : Journal of electromyography and kinesiology
Volume(Issue) : 33
Pages : 94
Pages to: 102
Publisher / Ed. Institution : Elsevier
Issue Date: 2017
License (according to publishing contract) : Licence according to publishing contract
Type of review: Peer review (publication)
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.
Departement: Health Professions
Organisational Unit: Institute of Physiotherapy (IPT)
Publication type: Article in scientific journal
DOI : 10.1016/j.jelekin.2017.02.003
ISSN: 1050-6411
1873-5711
URI: https://digitalcollection.zhaw.ch/handle/11475/12385
Appears in Collections:Publikationen Gesundheit

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