ISSN:
1432-2013
Keywords:
Muscle mechanics
;
Muscle activation
;
Force-velocity relation
Source:
Springer Online Journal Archives 1860-2000
Topics:
Medicine
Notes:
Abstract The time course of the contractile process was investigated in the presence of AR-L 115BS, a twitch potentiator which is thought to increase the rate of the Ca2+ binding by troponin and to improve the Ca2+ mobilization from the sarcoplasmic reticulum. AR-L 115BS increased markedly the rate of development of the force-velocity (T-V) relation and of the isometric tetanic tension. The effect on the rate of development of theT-V relation was however substantially more intense than that on the speed of rise of tetanic tension, thus reducing considerably the isometric tension level at which theT-V relation attained its final characteristics. The velocity of shortening under zero load and the degree of curvature of theT-V relation were not affected by AR-L 115BS. These findings support the view that the development of theT-V relation and the rise of the isometric tetanic tension measure the time course of two different processes.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00584342
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