Muscle function and hydrodynamics limit power and speed in swimming frogs

Clemente, Christofer J. and Richards, Christopher (2013) Muscle function and hydrodynamics limit power and speed in swimming frogs. Nature Communications, 4 2737.1-2737.8. doi:10.1038/ncomms3737

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Author Clemente, Christofer J.
Richards, Christopher
Title Muscle function and hydrodynamics limit power and speed in swimming frogs
Journal name Nature Communications   Check publisher's open access policy
ISSN 2041-1723
Publication date 2013-01-01
Sub-type Article (original research)
DOI 10.1038/ncomms3737
Open Access Status File (Publisher version)
Volume 4
Start page 2737.1
End page 2737.8
Total pages 8
Place of publication London, United Kingdom
Publisher Nature Publishing Group
Language eng
Subject 1600 Chemistry
1300 Biochemistry, Genetics and Molecular Biology
3100 Physics and Astronomy
Abstract Studies of the muscle force-velocity relationship and its derived n-shaped power-velocity curve offer important insights into muscular limits of performance. Given the power is maximal at 1/3 V max, geometric scaling of muscle force coupled with fluid drag force implies that this optimal muscle-shortening velocity for power cannot be maintained across the natural body-size range. Instead, muscle velocity may decrease with increasing body size, conferring a similar n-shaped power curve with body size. Here we examine swimming speed and muscle function in the aquatic frog Xenopus laevis. Swimming speed shows an n-shaped scaling relationship, peaking at 47.35 g. Further, in vitro muscle function of the ankle extensor plantaris longus also shows an optimal body mass for muscle power output (47.27 g), reflecting that of swimming speed. These findings suggest that in drag-based aquatic systems, muscle-environment interactions vary with body size, limiting both the muscle's potential to produce power and the swimming speed.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes via Nature Publishing (free access)

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2014 Collection
School of Biological Sciences Publications
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