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- Title
Strength Training Improves Fatigue Resistance and Self-Rated Health in Workers with Chronic Pain: A Randomized Controlled Trial.
- Authors
Sundstrup, Emil; Jakobsen, Markus Due; Brandt, Mikkel; Jay, Kenneth; Aagaard, Per; Andersen, Lars Louis
- Abstract
Chronic musculoskeletal pain is widespread in the working population and leads to muscular fatigue, reduced work capacity, and fear of movement. While ergonomic intervention is the traditional approach to the problem, physical exercise may be an alternative strategy. This secondary analysis of a randomized controlled trial investigates the effect of strength training on muscular fatigue resistance and self-rated health among workers with chronic pain. Sixty-six slaughterhouse workers with chronic upper limb pain and work disability were randomly allocated to 10 weeks of strength training or usual care ergonomic training (control). At baseline and follow-up, participants performed a handgrip muscular fatigue test (time above 50% of maximal voluntary contraction force) with simultaneous recording of electromyography. Additionally, participants replied to a questionnaire regarding self-rated health and pain. Time to fatigue, muscle strength, hand/wrist pain, and self-rated health improved significantly more following strength training than usual care (all P<0.05). Time to fatigue increased by 97% following strength training and this change was correlated to the reduction in fear avoidance (Spearman’s rho =-0.40; P=0.01). In conclusion, specific strength training improves muscular fatigue resistance and self-rated health and reduces pain of the hand/wrist in manual workers with chronic upper limb pain. This trial is registered with ClinicalTrials.gov <ext-link>NCT01671267</ext-link>.
- Subjects
DENMARK; CHRONIC pain; ARM; CONFIDENCE intervals; ELECTROMYOGRAPHY; EXERCISE tests; GRIP strength; HEALTH status indicators; ERGONOMICS; INDUSTRIAL hygiene; MUSCLE contraction; PROBABILITY theory; QUESTIONNAIRES; RESEARCH funding; STATISTICAL sampling; SCALE analysis (Psychology); SELF-evaluation; STATISTICS; DATA analysis; SECONDARY analysis; PAIN measurement; RANDOMIZED controlled trials; VISUAL analog scale; TREATMENT effectiveness; PRE-tests &; post-tests; REPEATED measures design; BLIND experiment; DATA analysis software; DESCRIPTIVE statistics; MUSCLE fatigue; RESISTANCE training; PREVENTION
- Publication
BioMed Research International, 2016, Vol 2016, p1
- ISSN
2314-6133
- Publication type
Article
- DOI
10.1155/2016/4137918