Muscle strength as a predictor of the magnitude of multidirectional force fluctuations during steady contractions

Salomoni, S. E. and Graven-Nielsen, T. (2011). Muscle strength as a predictor of the magnitude of multidirectional force fluctuations during steady contractions. In: 15Th Nordic-Baltic Conference On Biomedical Engineering and Medical Physics (NBC 2011). 15th Nordic-Baltic Conference on Biomedical Engineering and Medical Physics (NBC 2011), Aalborg, Denmark, (93-96). 14-17 June 2011. doi:10.1007/978-3-642-21683-1_23


Author Salomoni, S. E.
Graven-Nielsen, T.
Title of paper Muscle strength as a predictor of the magnitude of multidirectional force fluctuations during steady contractions
Conference name 15th Nordic-Baltic Conference on Biomedical Engineering and Medical Physics (NBC 2011)
Conference location Aalborg, Denmark
Conference dates 14-17 June 2011
Proceedings title 15Th Nordic-Baltic Conference On Biomedical Engineering and Medical Physics (NBC 2011)   Check publisher's open access policy
Journal name IFMBE Proceedings   Check publisher's open access policy
Place of Publication Berlin, Germany
Publisher Springer
Publication Year 2011
Sub-type Fully published paper
DOI 10.1007/978-3-642-21683-1_23
Open Access Status
ISBN 9783642216824
9783642216831
ISSN 1680-0737
Volume 34 IFMBE
Start page 93
End page 96
Total pages 4
Language eng
Abstract/Summary It has been shown that, during static contractions, the standard deviation of force increases linearly as the target force increases due to the orderly recruitment of motor units. In addition, previous studies suggested that larger muscle groups present lower normalized force fluctuations. The aim of the present study was to test the generalization of these two principles by the assessment of three-dimensional force fluctuations of different muscle groups during steady contractions of dorsiflexors, elbow flexors, trunk extensors, knee extensors, and plantarflexors. According to the results, although significant linear correlations exist between MVC forces and the different parameters of variability assessed, no clear relationship was found when the mean values were compared across muscle groups. Moreover, the present data demonstrate that high fluctuations of the task-related force component do not necessarily imply in high fluctuations of tangential components. Hence, factors such as co-contraction and the number of degrees of freedom in the joints might also account for the variability of multidirectional forces.
Keyword Force steadiness
Three-dimensional forces
Signal-dependent-noise
Isometric contractions
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Conference Paper
Collection: School of Health and Rehabilitation Sciences Publications
 
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