... active shortening, we measured muscle stiffness at optimal muscle length ( L 0 ) and the force response to time-varying activation and length perturbations. We found that muscle stiffness increased with activation but decreased as shortening velocity increased. The slope of the relationship between...

... dampening in fiber shortening velocities for both muscles, underscoring an indirect correlation between V actin and fiber V max that may be influenced by differences in fiber architecture, along with internal loading due to both passive and active effects. These influences correlate with the increased peak...

...: Although the sternohyoideus muscle shortens to generate small amounts of power, bluegill sunfish require large regions of axial musculature – operating at or near maximum power output – to power suction feeding. XROMM Fluoromicrometry Muscle work Muscle power Shortening velocity Fish can...

..., immunohistochemistry and gel electrophoresis were combined to identify and separate four MHC isoforms:MHC-slow and three fast MHC (2A, 2X, 2B). Maximum shortening velocity ( V o ) and isometric tension( P o ) were measured in single muscle fibres with known MHC isoform composition. Six groups of fibres (pure: slow, 2A...

... of force following shortening. * e-mail: [email protected] 30 07 1999 16 11 1999 © 1999 by Company of Biologists 1999 muscle work power shortening velocity Carcinus maenas In 1977, Weis-Fogh and Alexander published a theoretical study of the sustained...

...Graham N. Askew; Richard L. Marsh ABSTRACT The force–velocity relationship has frequently been used to predict the shortening velocity that muscles should use to generate maximal net power output. Such predictions ignore other well-characterized intrinsic properties of the muscle...

... T PF T 1/2 pH cardiac function shortening velocity power output muscle In contrast to hearts of vertebrates in general, the hearts of various freshwater turtles exhibit unusual tolerance to anoxia and acidosis. This ability correlates with the anoxia-tolerance of the whole animal...

... contraction was about 5 %. The maximum isometric force of the FA was low (about 6 N cm -2 ) but its shortening velocity was high. V m, the maximum shortening velocity determined from isotonic shortening, was 4.0 muscle lengths s −1 ; V 0, the maximum shortening velocity from slack test measurements, was about...

... the fibres to shorten under a very small load (<3 % of the force immediately before shortening) at various times after the onset of stimulation. The shortening velocity ( V sl ) was nearly constant during stimulation. After the cessation of stimulation, shortening velocity decreased steeply while...

... muscle contraction fish power force-velocity shortening velocity There has been much interest in measuring maximum speed at which fish can swim (burst swimming) (reviewed by Beamish, 1978 ) and in describing the quantitative relationships among the factors that determine the power required...

...T. Tsuchiya ABSTRACT 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 reduced osmotic strength. At normal osmotic strength, the average maximum shortening...