R
R. M. Alexander
Researcher at University of Leeds
Publications - 10
Citations - 1359
R. M. Alexander is an academic researcher from University of Leeds. The author has contributed to research in topics: Body movement & Work (physics). The author has an hindex of 8, co-authored 10 publications receiving 1261 citations.
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Energy-saving mechanisms in walking and running
TL;DR: It is suggested that muscles that are optimally adapted for their tasks in running should do positive work with constant efficiency, and that mammals exploit these energy-saving mechanisms.
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A model of bipedal locomotion on compliant legs.
TL;DR: A slow run with very brief foot contact becomes the optimum gait at low speeds, at which people would walk, unless severe energy dissipation occurs in the compliance.
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Leg design and jumping technique for humans, other vertebrates and insects
TL;DR: In this article, the effect of muscle moment arms, leg design and jumping technique on jump height has been investigated, and the effects of muscle mass on the jump height have been shown to increase with increased isometric force exerted by leg muscles.
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Fatigue rupture of wallaby tail tendons
TL;DR: It is shown that wallaby tail tendons fail after repeated application of stresses much lower than would be needed to break them in a single pull, a fatigue phenomenon, distinct from the creep rupture that occurs after prolonged application of a constant stress.
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Optimum Take-Off Techniques for High and Long Jumps
TL;DR: A simple model, which takes into account the mechanical properties of muscle, predicts optimum take-off techniques that agree well with those used by athletes and are remarkably insensitive to the numerical values assigned to the physiological parameters.