• Publications
  • Influence
A dynamic similarity hypothesis for the gaits of quadrupedal mammals
The dynamic similarity hypothesis postulates that different mammals move in a dynamically similar fashion whenever they travel at speeds that give them equal values of a dimensionless parameter, theExpand
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Why are mammalian tendons so thick
The maximum stresses to which a wide range of mammalian limb tendons could be subjected in life were estimated by considering the relative cross‐sectional areas of each tendon and of the fibres ofExpand
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  • PDF
Mechanical properties of various mammalian tendons
Dynamic tensile tests have been performed, using physiologically relevant frequencies and stress ranges, on various tendons from the legs and tails of 10 species of mammal. No consistent differencesExpand
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The spring in the arch of the human foot
Large mammals, including humans, save much of the energy needed for running by means of elastic structures in their legs and feet1,2. Kinetic and potential energy removed from the body in the firstExpand
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Allometry of the leg muscles of mammals
Measurements have been made of the leg muscles of mammals ranging from shrews Sorex to an elephant Loxodonta. Allometric equations based on body mass have been calculated for muscle masses, fibreExpand
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Storage of elastic strain energy in muscle and other tissues
Storage of strain energy in elastic materials has important roles in mammal running, insect jumping and insect flight. The elastic materials involved include muscle in every case, but only in insectExpand
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The Gaits of Bipedal and Quadrupedal Animals
The gaits of reptiles, birds, and mammals are reviewed. It is shown that mammals of different sizes tend to move in dy namically similar fashion whenever their Froude numbers u2/gh are equal: here uExpand
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The thickness of the walls of tubular bones
Some bones have slender marrow cavities and relatively thick walls. Others have wide cavities and thinner walls. Such differences are described by a quantity K, the ratio of the internal to theExpand
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Mechanics of posture and gait of some large dinosaurs
Dimensions of dinosaur bones and of models of dinosaurs have been used as the basis for calculations designed to throw light on the posture and gaits of dinosaurs. Estimates of the masses of someExpand
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Three Uses for Springs in Legged Locomotion
  • R. Alexander
  • Engineering, Computer Science
  • Int. J. Robotics Res.
  • 1 March 1990
Running animals and robots can save energy and reduce unwanted heat production by bouncing along on springs, using the principle of the pogo stick. Expand
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