...Caitlin Bemis; Nicolai Konow; Monica A. Daley; Kiisa Nishikawa ABSTRACT Traditional work loop studies, that use sinusoidal length trajectories with constant frequencies, lack the complexities of in vivo muscle mechanics observed in modern studies. This study refines methodology of the ‘avatar...

... difference in estimating muscle performance using in vivo -derived graded activation patterns compared with the traditionally used supramaximal square-wave activation pattern. Work loop Muscle mechanics Locomotion Activation Net work Biotechnology and Biological Sciences Research Council...

... are applied to ex vivo muscles from laboratory rodents. Guinea fowl Muscle mechanics Muscle fascicle strain Viscoelastic properties Work loop National Science Foundation http://dx.doi.org/10.13039/100000001 IOS-2016049 DBI-2021832 Decades of research on isolated...

...-selected cadence increases with power output, whereas at low power demands, minimizing knee muscle activation becomes important in cadence selection during cycling. Vastus lateralis muscle Joint power Crank power requirements Muscle mechanics Electromyography Chilean National Agency...

... in the lower leg are uncoupled during cross-country skiing at different speeds and inclines; while the muscle–tendon unit undergoes a stretch–shortening cycle during propulsion, fascicles shorten. Muscle mechanics Muscle activation XC-skiing Muscle–tendon interaction The human musculoskeletal...

... swimming in cuttlefish. Cephalopod Muscle mechanics Ontogeny Power output University of Leeds http://dx.doi.org/10.13039/501100000777 University of Leeds http://dx.doi.org/10.13039/501100000777 Jet propulsion swimming is a key part of cephalopod locomotion...

... for correspondence ( [email protected] ) Competing interests The authors declare no competing or financial interests. © 2021. Published by The Company of Biologists Ltd 2021 Summary: Here, we consider insights into muscle mechanics based on new ideas about the giant protein titin...

... resulted in lower work per cycle relative to unloaded trials at the same strain to control for length change and velocity effects on the work output, possibly due to greater accelerations of the muscle mass at higher strains. These results confirm that tissue mass reduces muscle mechanical work at larger...

... , A. A. ( 2009 ). The role of intrinsic muscle mechanics in the neuromuscular control of stable running in the guinea fowl . J. Physiol.   587 , 2693 - 2707 . 10.1113/jphysiol.2009.171017 Delp , S. L. , Anderson , F. C. , Arnold , A. S. , Loan , P. , Habib , A. , John , C. T...

... into dorsiflexion to aid foot clearance during leg swing. Fascicle Muscle mechanics Biomechanics Musculoskeletal modelling Ultrasound Muscles in the distal lower limb utilise connective tissue elasticity (e.g. tendon, aponeurosis) to enhance their performance. Investigations into a variety of anti...

...Gretchen Meyer; Richard L. Lieber ABSTRACT Differences in passive muscle mechanical properties between amphibians and mammals have led to differing hypotheses on the functional role of titin in skeletal muscle. Early studies of frog muscle clearly demonstrated intracellular load bearing by titin...

... sprinting, where the active positive work contribution of TS muscles was greater than for constant-speed maximal sprinting ( Lai et al., 2016 ). Broadly speaking, such muscle mechanics are in line with animal studies that show increased active muscle fascicle shortening to generate net positive joint work...

... and ATP use simultaneously. Muscle shortening is most energy costly, and lengthening least costly, a test of the Fenn effect. Muscle mechanics Muscle energetics 31 P MRS First dorsal interosseous All muscles produce force during contraction. The mechanisms, costs and consequences have...

..., no statistically significant difference was found, and the energy consumption of TA was slightly but non-significantly greater with exoskeletons. Table 1. Group mean (±s.d.) metrics of muscle mechanics for hopping with (SE) and without (NE) spring-loaded exoskeletons output by the simulations...

... energetics muscle mechanics rabbit contraction The cheetah [ Acinonyx jubatus (Schreber 1775)] is the fastest running animal with a top speed of 29 m s −1 ( Sharp, 1997 ), considerably faster than racehorses ( Spence et al., 2012 ) and racing greyhounds ( Usherwood and Wilson, 2005 ), which can...

... fatigue resistance. The underlying reasons for this muscle trade-off are poorly defined. The aim of this study was to test the hypothesis that inter-individual variation in muscle mechanics is associated with inter-individual differences in metabolic capacities and expression of calcium-handling proteins...

... elasticity muscle mechanics stiffness measurement 2009 9 2 2009 e-mail: [email protected] ...

.... † Author for correspondence (e-mail: [email protected] ) * Present address: Meakins-Christie Laboratories, McGill University, 3626 St Urbain Street, Montréal, Quebec, Canada H2X 2P2 17 7 2008 © The Company of Biologists Limited 2008 2008 muscle mechanics fibre cell slack...

... ) 30 4 2008 © The Company of Biologists Limited 2008 2008 muscle fiber type muscle architecture muscle mechanics scaling Examining functional and anatomical constraints that determine muscle function provides a useful perspective for understanding how muscles are designed...

... 2008 gait transition muscle mechanics swimming temperature Environmental temperature changes profoundly affect the locomotor performance of ectotherms (e.g. Rome and Alexander, 1970 ; Casey,1980 ; Herreid et al.,1981 ; Rome, 1982 ; Hirano and Rome, 1984 ; Marsh and Bennett, 1986b...