Biomechanical comparison of isokinetic lifting and free lifting when applied to chronic low back pain rehabilitation

The study compares free and isokinetic lifting using a multivariate statistical analysis. Each of the 13 male subjects performed three free lifts and three isokinetic lifts using a CYBEX LIFTASK. The measurement variables were obtained from a 3D video system, two force plates and two strain-gauge tr...

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Bibliographic Details
Published in:Medical & biological engineering & computing 2002-03, Vol.40 (2), p.183-192
Main Authors: BOUILLAND, S, LOSLEVER, P, LEPOUTRE, F. X
Format: Article
Language:English
Subjects:
Adult
Back pain
Biological and medical sciences
Biomechanical Phenomena
Biomechanics
Chronic Disease
Hoisting
Humans
Lifting
Lifts
Low Back Pain - rehabilitation
Male
Mathematical analysis
Mathematical models
Medical sciences
Movement
Multivariate Analysis
Muscle Contraction
Pain
Rehabilitation
Strategy
Studies
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Summary:The study compares free and isokinetic lifting using a multivariate statistical analysis. Each of the 13 male subjects performed three free lifts and three isokinetic lifts using a CYBEX LIFTASK. The measurement variables were obtained from a 3D video system, two force plates and two strain-gauge transducers. Coupling of fuzzy space-time windowing and multiple correspondence analysis was used to show the links between the variables and the differences between the experimental situations. Isokinetic lifting had almost no points in common with free-lifting, but there was a similar range of extension for the different joints. Most free-lifting strategies could not be used in isokinetic lifting, as constraints between the subject and his environment were different. The main drawback of the isokinetic lifting was due to the necessity for individuals to reach the machine speed, yielding high transient efforts. The maximum vertical effort at the L5/S1 joint was about 1600, 1500 and 1400N for low, medium and high speed, whereas it was lower than 1300N, irrespective of the load, during free lifting. In the context of chronic low back pain rehabilitation, movement strategies used in free lifting could not be relearnt using an isokinetic machine. A better understanding of the common points and differences between isokinetic movement and free movement could help rehabilitation physicians to plan rehabilitation programmes, taking advantage of each kind of movement.
ISSN:0140-0118
1741-0444
DOI:10.1007/BF02348123