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About the Cover
Cover: Xenopus laevis is an obligatorily aquatic frog. A blade element model was used to estimate hydrodynamic forces on X. laevis feet during swimming (pp. 3181−3194). Using this approach, Richards resolved thrust produced by rotational foot motion (blue arrows) and thrust produced by foot translation (red arrows). This analysis revealed that X. laevis depend on rotational foot motion (caused by ankle extension) far more than foot translation (driven by hip and knee extension) to power swimming. A general frog model was developed to further explore links between foot kinematics and swimming performance. Photo: Christopher Richards and Ed Yoo.
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