Affiliation:
1. Duke University, Department of Mechanical Engineering and Materials Science, Durham, NC 27708, USA
Abstract
SUMMARYIn the present study, we show that the fastest runners and swimmers are becoming not only faster but also heavier, taller and more slender. During the past century, the world record speeds for 100 m-freestyle and 100 m-dash have increased with body mass (M) raised to the power 1/6, in accordance with the constructal scaling of animal locomotion. The world records also show that the speeds have increased in proportion with body heights (H)raised to the power 1/2, in accordance with animal locomotion scaling. If the athlete's body is modeled with two length scales (H, body width L), the (M, H) data can be used to calculate the slenderness of the body, H/L. The world records show that the body slenderness is increasing very slowly over time.
Publisher
The Company of Biologists
Subject
Insect Science,Molecular Biology,Animal Science and Zoology,Aquatic Science,Physiology,Ecology, Evolution, Behavior and Systematics
Reference36 articles.
1. Ahlborn, B. K. (2004). Zoological Physics. Berlin: Springer.
2. Arnott, S. A., Neil, D. M. and Ansell, A. D.(1998). Tail-flip mechanism and size-dependent kinematics of escape swimming in the brown shrimp Cangon crangon.J. Exp. Biol.201,1771-1784.
3. Bartholomew, G. A. and Casey, T. M. (1978). Oxygen consumption of moths during rest, pre-flight warm-up, and flight in relation to body size and wing morphology. J. Exp. Biol.76,11-25.
4. Bejan, A. (2000). Shape and Structure: From Engineering to Nature. Cambridge: Cambridge University Press.
5. Bejan, A. (2005). The constructal law of organization in nature: tree-shaped flows and body size. J. Exp. Biol.208,1677-1686.
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