ArticleThe Journal of experimental biology2013
Power output of skinned skeletal muscle fibres from the cheetah (Acinonyx jubatus).
Article in The Journal of experimental biology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
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Who cites it
14 citing papers in PubMed, 23 citations in OpenAlex.
- How Multifunctioning Joints Produce Highly Agile Limbs in Animals with Lessons for Robotics.Biomimetics (Basel, Switzerland) · 2024Review
- Does sex matter in the cheetah? Insights into the skeletal muscle of the fastest land animal.The Journal of experimental biology · 2024Article
- Male and female syringeal muscles exhibit superfast shortening velocities in zebra finches.The Journal of experimental biology · 2024Article
- Revisiting specific force loss in human permeabilized single skeletal muscle fibers obtained from older individuals.American journal of physiology. Cell physiology · 2023Article
- Appendicular Muscle Physiology and Biomechanics inIntegrative organismal biology (Oxford, England) · 2020Article
- Baboon (Papio ursinus) single fibre contractile properties are similar to that of trained humans.Journal of muscle research and cell motility · 2018Article
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- Quasi-steady state aerodynamics of the cheetah tail.Biology open · 2016Article
- Force per cross-sectional area from molecules to muscles: a general property of biological motors.Royal Society open science · 2016Article
- Impact of TIEG1 Deletion on the Passive Mechanical Properties of Fast and Slow Twitch Skeletal Muscles in Female Mice.PloS one · 2016Article
- Frequency dependence of power and its implications for contractile function of muscle fibers from the digital flexors of horses.Physiological reports · 2014Article
- Comparative functional anatomy of the epaxial musculature of dogs (Canis familiaris) bred for sprinting vs. fighting.Journal of anatomy · 2014Article
- Locomotion dynamics of hunting in wild cheetahs.Nature · 2013Article
Corrections and comments
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Authors and funding
8 authors at 3 institutions in 1 country.
Funding
Abstract
Muscle samples were taken from the gluteus, semitendinosus and longissimus muscles of a captive cheetah immediately after euthanasia. Fibres were 'skinned' to remove all membranes, leaving the contractile filament array intact and functional. Segments of skinned fibres from these cheetah muscles and from rabbit psoas muscle were activated at 20°C by a temperature-jump protocol. Step and ramp length changes were imposed after active stress had developed. The stiffness of the non-contractile ends of the fibres (series elastic component) was measured at two different stress values in each fibre; stiffness was strongly dependent on stress. Using these stiffness values, the speed of shortening of the contractile component was evaluated, and hence the power it was producing. Fibres were analysed for myosin heavy chain content using gel electrophoresis, and identified as either slow (type I) or fast (type II). The power output of cheetah type II fibre segments was 92.5±4.3 W kg(-1) (mean ± s.e., 14 fibres) during shortening at relative stress 0.15 (the stress during shortening/isometric stress). For rabbit psoas fibre segments (presumably type IIX) the corresponding value was significantly higher (P<0.001), 119.7±6.2 W kg(-1) (mean ± s.e., 7 fibres). These values are our best estimates of the maximum power output under the conditions used here. Thus, the contractile filament power from cheetah was less than that of rabbit when maximally activated at 20°C, and does not account for the superior locomotor performance of the cheetah.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.