Journal article
Failed excitability of spinal motoneurons induced by prolonged running exercise
Journal of Neurophysiology, Vol.97(1), pp.596-603
2007
Abstract
The main purpose of this study was to investigate the modulations in H-reflex and V-wave responses (spinal loop properties) induced by prolonged locomotion activities. The second purpose was to compare the development of central fatigue between continuous and intermittent running modes. Eleven males randomly performed two 90-min running exercises either continuously (CONT, first ventilatory threshold) or intermittently (INT, 150 s at a velocity 20% higher than that during CONT/30 s of recovery). Neuromuscular tests of the plantar flexors [including M-wave and H-reflex at rest and M-wave and V-wave during maximal voluntary contraction (MVC)] were performed before and 5 and 30 min after the running exercises. During MVC, the torque significantly decreased (P < 0.05) from preexercise to 5 and 30 min postexercise (−11 and −9%, respectively), as did the RMS/M ratio (−11 and −13%, respectively) and the V/M ratio (−19 and −37%, respectively) for the soleus muscle. At rest, the H/M ratio also decreased significantly (P < 0.001) from preexercise to 5 and 30 min postexercise (−61 and −55%, respectively). Last, no difference in the alteration of spinal loop properties was noted between CONT and INT. In conclusion, the results regarding H-reflex and V-wave suggest for the first time a modulation in spinal loop properties after prolonged running.
Details
- Title
- Failed excitability of spinal motoneurons induced by prolonged running exercise
- Authors/Creators
- S. Racinais (Author/Creator) - Université de MontpellierO. Girard (Author/Creator) - Université de MontpellierJ.P. Micallef (Author/Creator) - Université de MontpellierS. Perrey (Author/Creator) - Université de Montpellier
- Publication Details
- Journal of Neurophysiology, Vol.97(1), pp.596-603
- Publisher
- American Physiological Society
- Identifiers
- 991005541040507891
- Copyright
- © 2007 by the American Physiological Society
- Murdoch Affiliation
- Murdoch University
- Language
- English
- Resource Type
- Journal article
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InCites Highlights
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- Collaboration types
- Domestic collaboration
- Citation topics
- 1 Clinical & Life Sciences
- 1.82 Gait & Posture
- 1.82.751 Myoelectric Control
- Web Of Science research areas
- Neurosciences
- Physiology
- ESI research areas
- Neuroscience & Behavior