Changes in muscle force-length properties affect the early rise of force in vivo
| Autor: | Anthony J. Blazevich, Sara Horne, Per Aagaard, David R. Coleman, Dale Cannavan |
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| Rok vydání: | 2009 |
| Předmět: |
Male
Muscle fascicle medicine.medical_specialty Contraction (grammar) Knee Joint Physiology Strength training Electromyography Isometric exercise Models Biological Quadriceps Muscle Cellular and Molecular Neuroscience In vivo Isometric Contraction Physiology (medical) Internal medicine medicine Humans medicine.diagnostic_test Chemistry Quadriceps muscle Anatomy Adaptation Physiological medicine.anatomical_structure Physical Fitness Cardiology Fascicle length Female Neurology (clinical) |
| Zdroj: | Blazevich, A J, Cannavan, D, Horne, S, Coleman, D R & Aagaard, P 2009, ' Changes in muscle force-length properties affect the early rise of force in vivo ', Muscle & Nerve, vol. 39, no. 4, pp. 512-20 . https://doi.org/10.1002/mus.21259 |
| ISSN: | 1097-4598 0148-639X |
| DOI: | 10.1002/mus.21259 |
| Popis: | Changes in contractile rate of force development (RFD), measured within a short time interval from contraction initiation, were measured after a period of strength training that led to increases in muscle fascicle length but no measurable change in neuromuscular activity. The relationship between training-induced shifts in the moment-angle relation and changes in RFD measured to 30 ms (i.e., early) and 200 ms (i.e., late) from the onset of isometric knee extension force were examined; shifts in the moment-angle relation were used as an overall measure of changes in quadriceps muscle fascicle length. A significant proportion of the variance in RFD measured only in the initial contraction phase (0-30 ms) could be explained by shifts in the moment-angle relation (r=-0.66-0.71; R2=0.44-0.50). Training-induced increases in muscle fascicle length may lead to a reduced or complete lack of adaptive gains in contractile RFD, especially in the early contraction phase. |
| Databáze: | OpenAIRE |
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