Predictors of residual force enhancement in voluntary contractions of elbow flexors
نویسندگان
چکیده
منابع مشابه
Supraspinal fatigue during intermittent maximal voluntary contractions of the human elbow flexors.
Responses to transcranial magnetic stimulation in human subjects (n = 9) were studied during series of intermittent isometric maximal voluntary contractions (MVCs) of the elbow. Stimuli were given during MVCs in four fatigue protocols with different duty cycles. As maximal voluntary torque fell during each protocol, the torque increment evoked by cortical stimulation increased from approximatel...
متن کاملIncreased ventilation does not impair maximal voluntary contractions of the elbow flexors.
Exercise performance is impaired by increased respiratory work, yet the mechanism for this is unclear. This experiment assessed whether neural drive to an exercising muscle was affected by cortically driven increases in ventilation. On each of 5 days, eight subjects completed a 2-min maximal voluntary contraction (MVC) of the elbow flexor muscles, followed by 4 min of recovery, while transcrani...
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Compared to pure isometric contractions, isometric muscle force at a given length is larger when the eccentric contraction is conducted before the isometric contraction. This phenomenon is widely known as residual force enhancement, and has been confirmed consistently in isolated muscle experiments. The purpose of this study was to confirm whether residual force enhancement also occurs in human...
متن کاملChanges in fascicle lengths and pennation angles do not contribute to residual force enhancement/depression in voluntary contractions.
Force enhancement following muscle stretching and force depression following muscle shortening are well-accepted properties of skeletal muscle contraction. However, the factors contributing to force enhancement/depression remain a matter of debate. In addition to factors on the fiber or sarcomere level, fiber length and angle of pennation affect the force during voluntary isometric contractions...
متن کاملObservations on force enhancement in submaximal voluntary contractions of human adductor pollicis muscle.
It has been observed consistently and is well accepted that the steady-state isometric force after active muscle stretch is greater than the corresponding isometric force for electrically stimulated muscles and maximal voluntary contractions. However, this so-called force enhancement has not been studied for submaximal voluntary efforts; therefore, it is not known whether this property affects ...
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ژورنال
عنوان ژورنال: Journal of Sport and Health Science
سال: 2018
ISSN: 2095-2546
DOI: 10.1016/j.jshs.2018.06.001