...Andrea Monte; Francesca Nardello; Riccardo Magris; Paolo Tecchio; Paola Zamparo ABSTRACT In this study, we used kinematic, kinetic, metabolic and ultrasound analysis to investigate the role of elastic energy utilization on the mechanical and physiological demands of a movement task (hopping...

... contribution of muscles and tendons to a given muscle–tendon unit (MTU) excursion. The aims of this study were to (i) compare muscle and tendon excursion between children and adults performing vertical hopping, and (ii) determine whether children and adults choose a hopping frequency that maximizes movement...

... and motor control of landing given their ability to land consistently during bouts of continuous hopping. Previous studies in anurans have shown that ground reaction forces (GRFs) during landing are significantly higher compared with takeoff and can potentially impart large torques about the center of mass...

...Koa N. Webster; Terence J. Dawson SUMMARY We examined the structure–function relationships that underlie the aerobic capacities of marsupial mammals that hop. Marsupials have relatively low basal metabolic rates (BMR) and historically were seen as ‘low energy’ mammals. However, the red kangaroo...

...Edward P. Snelling; Roger S. Seymour; Philip G. D. Matthews; Sue Runciman; Craig R. White SUMMARY The hemimetabolous migratory locust Locusta migratoria progresses through five instars to the adult, increasing in size from 0.02 to 0.95 g, a 45-fold change. Hopping locomotion occurs at all life...

...Iman Borazjani; Fotis Sotiropoulos; Edwin Malkiel; Joseph Katz SUMMARY We integrate high-resolution experimental observations of a freely hopping copepod with three-dimensional numerical simulations to investigate the role of the copepod antennae in production of hydrodynamic force during hopping...

...C. P. McGowan; R. V. Baudinette; A. A. Biewener We examined the functional role of two major proximal leg extensor muscles of tammar wallabies during level and inclined hopping (12°, 21.3% grade). Previous in vivo studies of hopping wallabies have revealed that,unlike certain avian bipeds, distal...

...C. P. McGowan; R. V. Baudinette; J. R. Usherwood; A. A. Biewener SUMMARY The goal of our study was to explore the mechanical power requirements associated with jumping in yellow-footed rock wallabies and to determine how these requirements are achieved relative to steady-speed hopping mechanics...

...C. P. McGowan; R. V. Baudinette; A. A. Biewener SUMMARY Measurements of joint work and power were determined using inverse dynamics analysis based on ground reaction force and high-speed video recordings of tammar wallabies as they decelerated and accelerated while hopping over a force platform...

... hopping. To address this question, we obtained measurements of muscle activation ( via electromyography),fascicle strain ( via sonomicrometry) and muscle-tendon force( via tendon buckles) from the lateral gastrocnemius (LG) and plantaris (PL) muscles of tammar wallabies trained to hop on a level...

... seems to adapt to muscle use, and its stiffness seems to be`tuned' to the frequency of normal muscle use. * e-mail: [email protected] 13 5 2002 © The Company of Biologists Limited 2002 2002 elastic recoil strain energy eccentric hopping stride frequency titin...

...Myriam Verstappen; Peter Aerts; Raoul Van Damme ABSTRACT The inter-limb kinematic patterns of walking, running and out-of-phase hopping in black-billed magpies ( Pica pica ) were studied using high-speed video recordings. The flexion/extension patterns of the joints were similar between the gait...

...Andrew A. Biewener; David D. Konieczynski; Russell V. Baudinette ABSTRACT Moderate to large macropodids can increase their speed while hopping with little or no increase in energy expenditure. This has been interpreted by some workers as resulting from elastic energy savings in their hindlimb...

...Andrew A. Biewener; Russell V. Baudinette ABSTRACT In order to evaluate the role of elastic energy recovery in the hopping of macropodids, in vivo measurements of muscle–tendon forces using buckle force transducers attached to the tendons of the gastrocnemius (G), plantaris (PL) and flexor...