A team of researchers at the University of Liverpool’s Institute of Life Course & Medical Sciences, working with a colleague from Liverpool John Moores University, has discovered why people use more energy when walking on surfaces that deform (such as sand) than on hard, cement-like surfaces. In their study, published in Journal of the Royal Society Interface, the group studied the behavior of muscles in the legs, feet and toes of volunteers walking on varied surfaces.
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Source: Phys.org