Journal of Applied Physiology Information on EB 2010
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

J Appl Physiol 77: 802-806, 1994;
8750-7587/94 $5.00
This Article
Right arrow Full Text (PDF)
Right arrow Submit a response
Right arrow Alert me when this article is cited
Right arrow Alert me when eLetters are posted
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Van der Hoeven, J. H.
Right arrow Articles by Lange, F.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Van der Hoeven, J. H.
Right arrow Articles by Lange, F.

Journal of Applied Physiology, Vol 77, Issue 2 802-806, Copyright © 1994 by American Physiological Society

ARTICLES

Supernormal muscle fiber conduction velocity during intermittent isometric exercise in human muscle

J. H. Van der Hoeven and F. Lange
Department of Clinical Neurophysiology, University Hospital Groningen, The Netherlands.

Muscle fiber conduction velocity (MFCV) and surface electromyographic parameters were studied in the brachial biceps muscle of healthy males during voluntary intermittent isometric contractions at 50% of maximum force. Recovery in the following 15 min was then observed. The measurements were performed during duty cycles of 33, 25, and 20%. The main finding was a supernormal MFCV during the exercise phase when the duty cycle was 25 and 20%. The level continued to increase during the recovery phase. During the exercise phase when the duty cycle was 33%, the MFCV decreased slightly (suggesting that the local anaerobic threshold had been surpassed) but increased during recovery to supernormal values. The ratio of median frequency to MFCV was constant during all experiments, indicating that the changes in median frequency reflect those in MFCV. We suggest that the supernormal MFCV was due to a combination of altered membrane properties, muscle fiber swelling, and temperature increase and hypothesize that the changes of electrical properties formed part of an adaptive mechanism of the muscle fiber membrane during exercise. In that respect, the increase of the MFCV could be a component of the well-known warm-up effect.


This article has been cited by other articles:


Home page
 NeurologyHome page
H. Nodera, H. Bostock, Y. Izumi, K. Nakamura, R. Urushihara, T. Sakamoto, N. Murase, H. Shimazu, S. Kusunoki, and R. Kaji
Activity-dependent conduction block in multifocal motor neuropathy: magnetic fatigue test.
Neurology, July 25, 2006; 67(2): 280 - 287.
[Abstract] [Full Text] [PDF]

Home page
 J. Neurophysiol.Home page
D. Farina, L. Arendt-Nielsen, R. Merletti, and T. Graven-Nielsen
Effect of Experimental Muscle Pain on Motor Unit Firing Rate and Conduction Velocity
J Neurophysiol, March 1, 2004; 91(3): 1250 - 1259.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
F. Lange, T. W. Van Weerden, and J. H. Van Der Hoeven
A new surface electromyography analysis method to determine spread of muscle fiber conduction velocities
J Appl Physiol, August 1, 2002; 93(2): 759 - 764.
[Abstract] [Full Text] [PDF]

Home page
 J. Physiol.Home page
G A Rongen, J P van Dijk, E E van Ginneken, D F Stegeman, P Smits, and M J Zwarts
Repeated ischaemic isometric exercise increases muscle fibre conduction velocity in humans: involvement of Na+-K+-ATPase
J. Physiol., May 1, 2002; 540(3): 1071 - 1078.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
K. Roeleveld, B. G. M. van Engelen, and D. F. Stegeman
Possible mechanisms of muscle cramp from temporal and spatial surface EMG characteristics
J Appl Physiol, May 1, 2000; 88(5): 1698 - 1706.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Visit Other APS Journals Online