Results 251 to 260 of about 274,178 (292)
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Energetics of isometric contractions as a function of muscle temperature
American Journal of Physiology-Cell Physiology, 1983The energetic cost of generating isometric force in isolated frog muscle was examined at 10, 20, and 30 degrees C. Recovery O2 consumption (delta O2) and recovery lactate production (delta Lact) were measured under conditions in which O2 was not limiting metabolism.
L C, Rome, M J, Kushmerick
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Electrical impedance of muscle during isometric contraction
Physiological Measurement, 2003Non-invasive measurements of the 50 kHz impedance of the anterior forearm show that the resistance and reactance increase under voluntary isometric contraction of the finger flexor muscles. The relationship between impedance and force is nonlinear, dependent on the type of test, the history of prior exercise, and the health status of the subject ...
Carl A, Shiffman +2 more
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Spinal cord modulation associated with isometric contractions
Brain Research, 2002The dual-strategy hypothesis explains single-joint voluntary movement by dividing movements into two different strategies and suggesting that different excitation pulses modulate these movements. The existence of this excitation pulse was evaluated by quantifying magnitude and timing changes in the H-reflex (changes in spinal excitability) prior to a ...
Julie A, Robichaud +2 more
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Influence of vibration on endurance of maximal isometric contraction
Clinical Physiology, 1989Summary. In order to investigate how vibration affects endurance during muscular contraction, knee‐joint extension efforts were performed with and without superimposed vibrations. Fourteen healthy non‐smoking 20‐year‐old males performed maximal isometric and sustained knee‐joint extension efforts (angle 90°) in sitting posture three times with each ...
B, Samuelson, L, Jorfeldt, B, Ahlborg
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Isometric Contraction of the Extraocular Muscles
1978For many years investigators have been trying to get a quantitative impression of the pulling power of eye muscles. Until about 1967 the only methods of assessment were Electromyography (EMG) and the Forced Duction Test (FDT). In particular, EMG is of great value.
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Interactions between fatiguing and nonfatiguing isometric contractions
Journal of Applied Physiology, 1981Isometric contractions of the handgrip muscles were exerted by eight male subjects (age range 19-24 yr) to determine the relationship between fatiguing and nonfatiguing isometric contractions. In a first series of experiments, subjects exerted fatiguing isometric contractions at tensions of 25, 40, or 70% of the maximum strength of the subjects (MVC ...
D E, Stafford, J S, Petrofsky
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Cardiovascular Adjustments To Isometric Contractions
1993Abstract The purpose of this chapter is to discuss the cardiovascular adjustments to isometric contractions-also called isometric or static exercise-and to contrast these adjustments with those already described for dynamic exercise. This will provide background and set the stage for later chapters dealing with the reflexes that govern ...
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Maximum voluntary isometric contraction (MVIC)
Amyotrophic Lateral Sclerosis and Other Motor Neuron Disorders, 2004Merit, Cudkowicz +3 more
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WEAKNESS OF ISOMETRIC CONTRACTION IN NEUROLABILITY
Acta Psychiatrica Scandinavica, 1964openaire +2 more sources