Muscle shortening
Muscle dynamics in skipjack tuna: timing of red muscle shortening in relation to activation and body curvature during steady swimming
... unique muscle activation and strain pattern, a critical distinction between skipjack tuna and other fish is the apparent uncoupling of red muscle strain from local body ...red muscle in other fish, ...
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Fast start muscle dynamics in the rainbow trout Oncorhynchus mykiss: phase relationship of white muscle shortening and body curvature
... where muscle shortening at a given location was found to be in phase with curvature at a much more posterior location (Shadwick et ...white muscle in fast- starts of ...which muscle shortens ...
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Load, Work, and Velocity of Muscle Shortening of the Left Ventricle in Normal and Abnormal Human Hearts
... It was concluded from these experiments that force-time relationships during left ventricular systole could be studied with reasonable accuracy without knowing the instantaneous aortic f[r] ...
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Minimal shortening in a high frequency muscle
... Although muscle strain has not yet been measured in vivo in vertebrate muscles contracting at very high frequencies, several lines of evidence suggest that these contractions involve minimal strains produced by ...
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The slack test does not assess maximal shortening velocity of muscle fascicles in humans
... prevent muscle shortening velocity from reaching its full potential (Chow and Darling, 1999; Duclay et ...of muscle – tendon interactions and neural control involved in the successive motor-driven ...
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Stuck in gear: age related loss of variable gearing in skeletal muscle
... in muscle performance with ...maximum muscle shortening velocity ...active muscle stress with age have largely been attributed to an increased contribution of connective tissues (Kjaer, 2004; ...
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A motor and a brake: two leg extensor muscles acting at the same joint manage energy differently in a running insect
... determine muscle force and power output during cyclical contractions (for a review, see Josephson, 1999), in the present study, we focus on three muscle properties: the kinetics of force generation, ...
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The Effects of a 6-Week Dry Land Exercise Program for High School Swimmers
... Background: In swimmers, the great number of stroke repetitions and force generated through the upper extremity, leaves the shoulder uniquely vulnerable to injury. Numerous high school swimmers experience shoulder pain, ...
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Energy cost of isometric force production after active shortening in skinned muscle fibres
... active muscle lengthening and shortening, and whether residual force enhancement mirrors force depression, remain a matter of debate (Edman et ...skeletal muscle becomes more efficient when actively ...
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Shoe heel abrasion and its possible biomechanical cause: a transversal study with infantry recruits
... Calf muscle shortening was also evaluated with the Silfverskiold test ...calf muscle shortening, and those with calf shortening (less than 5° of dorsiflexion) were differentiated in ...
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Role of axial muscles in powering mouth expansion during suction feeding in largemouth bass (Micropterus salmoides)
... sternohyoid, shortening against an immobile pectoral girdle to retract the hyoid, and the hypaxial muscles, shortening to retract both the pectoral girdle and hyoid, could contribute ventral expansion ...
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Powered ankle exoskeletons reveal the metabolic cost of plantar flexor mechanical work during walking with longer steps at constant step frequency
... positive muscle work at the proximal joints ...ankle muscle–tendon system consumes 26% of the total net metabolic energy but produces 40% of the total positive mechanical work during ...lower-limb ...
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Optimal shortening velocity (V/Vmax) of skeletal muscle during cyclical contractions: length force effects and velocity dependent activation and deactivation
... the muscle is activated during lengthening, the force developed will stretch series elastic structures, such as the tendon, in proportion to the force ...in muscle force during subsequent shortening ...
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Effects of temperature and force requirements on muscle work and power output
... of muscle contraction and maintain performance at lower temperatures by using elastic-recoil mechanisms in their feeding movements (chameleons: Anderson and Deban, 2010; toads: Deban and Lappin, 2011; salamanders: ...
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The Maximum Shortening Velocity of Holothurian Muscle and Effects of Tonicity Change on it
... The maximum shortening velocity of the longitudinal retractor muscle of the holothurian, Isostichopus badionotus, was measured using a 'slack test' in solutions of normal, increased and [r] ...
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Scaling of muscle performance during escape responses in the fish myoxocephalus scorpius L
... white muscle (for a review, see Domenici and Blake, ...of muscle (Wardle, ...of muscle increased and the maximum unloaded shortening velocity (V 0 ) decreased ...
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Differences in contractile behaviour between the soleus and medial gastrocnemius muscles during human walking
... MG muscle also shortened ~20% faster in the pushoff phase, which would theoretically further decrease MG force because of the force–velocity relationship (Farris and Sawicki, 2012b; Prilutsky et ...MG ...
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Influence of muscle length on work from trabecular muscle of frog atrium and ventricle
... increasing muscle length well beyond the length found to be optimal for work output (Figs 1, ...crab muscle reaches a maximum before the muscle length reaches the peak of the isometric length–tension ...
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The pectoralis minor length test: a study of the intra rater reliability and diagnostic accuracy in subjects with and without shoulder symptoms
... The pectoralis minor length test has been advocated to clinically identify a shortening of this muscle that may be associated with clinical syndromes, loss of function and pain in the shoulder and upper ...
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Relationship of quadriceps muscle power and optimal shortening velocity with angiotensin-converting enzyme activity in older women
... Interestingly, the results of our observations may also suggest positive effect of ACEI on muscle parameters and functional performance. Women taking ACEI were almost 2 years older, had lower health status ...
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