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Keywords: mechanical work
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Journal Articles
J Exp Biol (2020) 223 (19): jeb224410.
Published: 7 October 2020
... on living tissue. Therefore, in this study we conducted in situ work-loop experiments on rat plantaris muscle to determine the effects of increasing the mass of muscle on mechanical work during cyclic contractions. We additionally simulated these experimental contractions using a mass-enhanced Hill-type...
Includes: Supplementary data
Journal Articles
J Exp Biol (2019) 222 (22): jeb209460.
Published: 25 November 2019
... Impulse Mechanical work Hip Knee Ankle Much of what we know about lower-limb joint mechanics during locomotion in animals and humans has been gleaned from experiments involving constant speed and level ground conditions, neither of which requires a net change in the body's forward kinetic...
Includes: Supplementary data
Journal Articles
J Exp Biol (2017) 220 (22): 4252–4260.
Published: 15 November 2017
...Dominic James Farris; Brent James Raiteri ABSTRACT Humans and other cursorial mammals have distal leg muscles with high in-series compliance that aid locomotor economy. This muscle–tendon design is considered sub-optimal for injecting net positive mechanical work. However, humans change speed...
Journal Articles
J Exp Biol (2017) 220 (16): 2993–3000.
Published: 15 August 2017
...Brian P. Selgrade; Montakan Thajchayapong; Gloria E. Lee; Megan E. Toney; Young-Hui Chang ABSTRACT Minimizing whole-body metabolic cost has been suggested to drive the neural processes of locomotor adaptation. Mechanical work performed by the legs should dictate the major changes in whole-body...
Journal Articles
J Exp Biol (2015) 218 (6): 876–886.
Published: 15 March 2015
... with the mechanical work computed from commonly used joint- and segment-level estimates. We observe that the Push-off work performed by the stance limb joints and foot segment – work performed rotationally (represented by green arrows) about the hip, knee and ankle joints [from 3 degree-of-freedom (DOF) inverse...
Journal Articles
J Exp Biol (2014) 217 (21): 3910–3918.
Published: 1 November 2014
.... Mechanical work against the external environment was 0.87 J m −1 kg −1 for DS, 0.70 J m −1 kg −1 for DP and 0.79 J m −1 kg −1 for DK. The work done to overcome frictional forces, which is negligible in walking and running, was 17.8%, 32.3% and 24.8% of external mechanical work for DS, DP and DK, respectively...
Includes: Supplementary data
Journal Articles
J Exp Biol (2012) 215 (10): 1728–1739.
Published: 15 May 2012
... us to better understand the mechanics of primate gaits and shed new light on primate locomotor evolution. * Author for correspondence ( matthew.oneill@stonybrook.edu ) 6 2 2012 © 2012. 2012 locomotion center of mass collision gait mechanical work quadruped lemur Lemur...
Journal Articles
J Exp Biol (2010) 213 (24): 4257–4264.
Published: 15 December 2010
... not only cushion impacts but also appear to perform substantial work. * Author for correspondence ( kzelik@umich.edu ) 9 7 2010 © 2010. 2010 locomotion mechanical work soft tissue walking biomechanics wobbling mass Locomotion is accomplished by performing positive...
Includes: Supplementary data
Journal Articles
J Exp Biol (2010) 213 (24): 4265–4271.
Published: 15 December 2010
... step-to-step transition gait biomechanics mechanical work metabolic cost Step-to-step transitions are an important determinant of the mechanical work and metabolic cost of walking ( Donelan et al., 2002a ). The single support phase of walking is characterized by center of mass (COM) motion...
Journal Articles
J Exp Biol (2007) 210 (18): 3255–3265.
Published: 15 September 2007
... locomotion gait biomechanics energetics mechanical work Normal human walking is characterized by economical patterns of movement. Not only do individuals generally choose a walking speed that requires the least energy to travel a given distance( Ralston, 1958 ), but over the usual range...
Journal Articles
J Exp Biol (2004) 207 (4): 587–596.
Published: 1 February 2004
...B. Schepens; G. J. Bastien; N. C. Heglund; P. A. Willems SUMMARY The effect of age and body size on the total mechanical work done during walking is studied in children of 3–12 years of age and in adults. The total mechanical work per stride ( W tot ) is measured as the sum of the external work, W...
Journal Articles
J Exp Biol (1986) 120 (1): 333–350.
Published: 1 January 1986
... decline in cellular [K + ] occurred in concert with increases in extracellular [K + . In saline-perfused gastrocnemii of Xenopus , the uptake of vascular water was proportional to the total mechanical work performed. Saline leaving the femoral vein of isotonically contracting gastrocnemius muscles had...