Running
Running is a means of terrestrial locomotion allowing humans and other animals to move rapidly on foot. It is simply defined in athletics terms as a gait in which at regular points during the running cycle both feet are off the ground. This is in contrast to walking, where one foot is always in contact with the ground, the legs are kept mostly straight and the center of gravity vaults over the legs in an inverted pendulum fashion. A characteristic feature of a running body from the viewpoint of spring-mass mechanics is that changes in kinetic and potential energy within a stride occur simultaneously, with energy storage accomplished by springy tendons and passive muscle elasticity. The term running can refer to any of a variety of speeds ranging from jogging to sprinting.
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Famous quotes containing the word running:
“The rain makes still pools on the sidewalk.
The rain makes running pools in the gutter.
The rain plays a little sleep-song on our roof at night—”
—Langston Hughes (1902–1967)
“I must down to the seas again for the call of the running tide Is a wild call and a clear call that may not be denied.”
—John Masefield (1874–1967)
“It was far in the sameness of the wood;
I was running with joy on the Demon’s trail,
Though I knew what I hunted was no true god.”
—Robert Frost (1874–1963)