Journal of Rehabilitation Research & Development (JRRD)

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Volume 52 Number 1, 2015
   Pages 21 — 30

Abstract — Timed loaded standing in female chronic fatigue syndrome compared with other populations

Jan b Eyskens, MSc PT, DO, Pr Ph;1* Jo Nijs;2 Kristiaan D’Août;3 Alain Sand, MD;4 Kristien Wouters;5—6 Greta Moorkens, MD, PhD1,6

1Department of Internal Medicine, Antwerp University Hospital, Antwerp, Belgium; 2Pain in Motion Research Group; Departments of Human Physiology and Physiotherapy, Vrije Universiteit Brussel, Brussels, Belgium; and Department of Physical Medicine and Physiotherapy, University Hospital Brussels, Brussels, Belgium; 3Department of Musculoskeletal Biology, Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool, UK; Department of Biology, University of Antwerp, Antwerp, Belgium; 4Nuclear Medicine, AZ Jan Palfijn, Ghent, Belgium; 5Department of Scientific Coordination and Biostatistics, Antwerp University Hospital, Antwerp, Belgium; 6Faculty of Medicine and Health Science, University of Antwerp, Antwerp, Belgium

Abstract — Patients with chronic fatigue syndrome (CFS), like patients with osteoporosis, have similar difficulties in standing and sitting. The aim of the study was to compare combined trunk and arm endurance among women with CFS (n = 72), women with osteoporosis (n = 30), nondisabled women (n = 55), and women from non-industrialized countries (n = 58) using the timed loaded standing (TLS) test. TLS measures how long a person can hold a 1 kg dumbbell in each hand in front of him or her with straight arms. TLS was higher in the industrialized nondisabled population than in the non-industrialized study population (p < 0.001) and in patients with osteoporosis (p = 0.002). TLS was lower in patients with CFS than in nondisabled controls (p < 0.001). After adjusting for age, body height, and weight, combined trunk and arm endurance was lower in CFS patients than in osteoporotic patients, even though the patients with osteoporosis were more than 25 yr older (p < 0.001). In CFS, TLS was lower than in the non-industrialized group (p = 0.02). Since only women were studied, external validity of the results is limited to adult female patients with CFS. TLS revealed a specific biomechanical weakness in CFS patients that can be taken into account from the onset of a rehabilitation program. We propose that influencing the quality, rather than the quantity, of movement could be used in the rehabilitation.

Key words: chronic fatigue syndrome, deformation, endurance, graded exercise/exposure therapy, movement, non-­industrialized population, osteoporosis, physical performance, timed loaded standing, trunk.

Abstract corrected from original 11/5/15: Erratum in 52(7) JRRD 2015.


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This article and any supplementary material should be cited as follows:
Eyskens JB, Nijs J, D’Août K, Sand A, Wouters K, Moorkens G. Timed loaded standing in female chronic fatigue syndrome compared with other populations. J Rehabil Res Dev. 2015;52(1):21—30.
http://dx.doi.org/10.1682/JRRD.2014.03.0086
ResearcherID: Jan b Eyskens, MSc PT, DO, Pr Ph: B-8552-2015; Jo Nijs: B-3336-2011; Greta Moorkens, MD, PhD: B-8776-2015
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