Shortening-induced residual force depression in humans
نویسندگان
چکیده
منابع مشابه
Shortening-induced force depression in human adductor pollicis muscle.
1. The effects of single isovelocity shortening contractions on force production of the electrically stimulated human adductor pollicis muscle were investigated in seven healthy male subjects. 2. Redeveloped isometric force immediately following isovelocity shortening was always depressed compared with the isometric force recorded at the same muscle length but without preceding shortening. The ...
متن کاملResidual force depression following muscle shortening is exaggerated by prior eccentric drop jump exercise.
We studied the relation between two common force modifications in skeletal muscle: the prolonged force depression induced by unaccustomed eccentric contractions, and the residual force depression (rFD) observed immediately after active shortening. We hypothesized that rFD originates from distortion within the sarcomeres and the extent of rFD: 1) correlates to the force and work performed during...
متن کاملResidual force depression is not abolished following a quick shortening step.
Residual force depression is long lasting, but can be abolished instantaneously when a muscle is deactivated just long enough for force to drop to zero. According to the "cross-bridge inhibition theory" of force depression, this result is predicted as the release of stress on actin during deactivation restores the angular distortion of the actin binding sites, thereby establishing conditions id...
متن کاملForce depression in human quadriceps femoris following voluntary shortening contractions.
The purpose of this study was to investigate whether the isometric muscle force, redeveloped following maximal-effort voluntary shortening contractions in human skeletal muscle, is smaller than the purely isometric muscle force at the corresponding length. Isometric knee extensor moments, surface electromyographic (EMG) signals of quadriceps femoris, and interpolated twitch moments (ITMs) were ...
متن کاملShortening‐induced force depression is modulated in a time‐ and speed‐dependent manner following a stretch–shortening cycle
The steady-state isometric force following active muscle shortening or lengthening is smaller (force depression, FD) or greater (residual force enhancement, RFE) than a purely isometric contraction at the corresponding length. The mechanism underlying these phenomena is not explained within the context of the cross-bridge theory, with few studies investigating the effects of FD and RFE in stret...
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ژورنال
عنوان ژورنال: Journal of Applied Physiology
سال: 2019
ISSN: 8750-7587,1522-1601
DOI: 10.1152/japplphysiol.00931.2018