Journal of Applied Physiology Watch the video to learn how APS reaches out to developing nations.
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

J Appl Physiol 64: 502-510, 1988;
8750-7587/88 $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
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 Hatcher, D. D.
Right arrow Articles by Luff, A. R.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Hatcher, D. D.
Right arrow Articles by Luff, A. R.

Journal of Applied Physiology, Vol 64, Issue 2 502-510, Copyright © 1988 by American Physiological Society

ARTICLES

Contractile properties of cat skeletal muscle after repetitive stimulation

D. D. Hatcher and A. R. Luff
Department of Physiology, Monash University, Clayton, Victoria, Australia.

The isometric and force-velocity properties of the fast-twitch flexor digitorum longus (FDL) and slow-twitch soleus muscles were investigated immediately after and during recovery from a fatiguing stimulus regime (40 Hz for 330 ms every second for 180 s) in the anesthetized cat. The amplitude of the isometric twitch of FDL was unaffected but in soleus it remained depressed for much of the recovery period. Immediately after stimulation the twitch time to peak of FDL increased to 140% of the control (prefatigue) value and then reverted to control values. The maximum isometric tetanic tension (Po) developed by FDL was reduced to 67% of control values immediately after the stimulus regime, whereas soleus declined to 93% of control. Recovery of maximum force development was achieved after 45 min in FDL and after 15 min in soleus. The maximum speed of shortening of FDL was reduced to 63% of control values immediately after fatigue; despite some recovery within the first 30 min, it remained depressed during the remainder of the recovery period (up to 300 min). Maximum speed of shortening was unaltered in soleus. The a/Po value transiently increased to 176% of control values in FDL immediately after the fatigue regime but promptly returned to control values. Force-velocity properties of soleus were not affected by the stimulus regime. It is concluded that in FDL changes in the maximum speed of shortening and maximum isometric tension as a result of the stimulus regime are attributable to changes in the intrinsic behavior of cross-bridges and the metabolic status of the fibers, particularly in the fast-twitch fatigue-resistant fibers.


This article has been cited by other articles:


Home page
 J. Physiol.Home page
S. A. Jubrias, N. K. Vollestad, R. K. Gronka, and M. J. Kushmerick
Contraction coupling efficiency of human first dorsal interosseous muscle
J. Physiol., April 1, 2008; 586(7): 1993 - 2002.
[Abstract] [Full Text] [PDF]

Home page
 Am. J. Physiol. Cell Physiol.Home page
C. Karatzaferi, K. H. Myburgh, M. K. Chinn, K. Franks-Skiba, and R. Cooke
Effect of an ADP analog on isometric force and ATPase activity of active muscle fibers
Am J Physiol Cell Physiol, April 1, 2003; 284(4): C816 - C825.
[Abstract] [Full Text] [PDF]

Home page
 J. Appl. Physiol.Home page
D. G. Behm and D. M. M. St-Pierre
Effects of fatigue duration and muscle type on voluntary and evoked contractile properties
J Appl Physiol, May 1, 1997; 82(5): 1654 - 1661.
[Abstract] [Full Text] [PDF]


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