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Journal article
EFFECT OF KNEE POSITION ON QUADRICEPS MUSCLE FORCE STEADINESS AND ACTIVATION STRATEGIES
Muscle & nerve, v 43(4), pp 563-573
Apr 2011
PMID: 21404288
Abstract
Introduction: In this study we investigated the effect of knee position on quadriceps force steadiness and activation strategies. Methods: Quadriceps force steadiness was evaluated in 22 volunteers at two knee positions by testing their ability to regulate submaximal force. Muscle activation strategies were studied in both time and frequency domains using surface electromyography. Results: Quadriceps force fluctuations and the associated agonist and antagonist activity were significantly higher at 90 degrees than at 30 degrees of flexion (P < 0.05). The quadriceps median frequency recorded at 30 degrees was significantly higher than at 90 degrees of flexion (P < 0.05). Regression analyses revealed that force steadiness was related to quadriceps activation and median frequency (P < 0.001), but not to hamstring coactivation (P > 0.05). Conclusions: The results indicate that knee position significantly affects quadriceps force steadiness and activation strategies. This finding may have important implications for designing a force control testing protocol and interpreting test results. Muscle Nerve 43: 563-573, 2011
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Details
- Title
- EFFECT OF KNEE POSITION ON QUADRICEPS MUSCLE FORCE STEADINESS AND ACTIVATION STRATEGIES
- Creators
- Chandramouli Krishnan - Shirley Ryan AbilityLabEric J. Allen - University of IowaGlenn N. Williams - University of Iowa
- Publication Details
- Muscle & nerve, v 43(4), pp 563-573
- Publisher
- Wiley
- Number of pages
- 11
- Grant note
- Davee Foundation K12HD055931 / EUNICE KENNEDY SHRIVER NATIONAL INSTITUTE OF CHILD HEALTH & HUMAN DEVELOPMENT; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH Eunice Kennedy Shriver National Institute of Child Health & Human Development (NICHD) K12 HD055931 / NIH; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physical Therapy (and Rehabilitation Sciences)
- Web of Science ID
- WOS:000288462400014
- Scopus ID
- 2-s2.0-79953059035
- Other Identifier
- 991021887709204721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Clinical Neurology
- Neurosciences