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:
“But the ball is lost and the mallet slipped long since from the hands
Under the running tap that are not the hands of a child.”
—Louis MacNeice (1907–1963)
“Kicking the heart
with pain’s big boots running up and down
the intestines like a motorcycle racer.”
—Anne Sexton (1928–1974)
“The pleasure of jogging and running is rather like that of wearing a fur coat in Texas in August: the true joy comes in being able to take the damn thing off.”
—Joseph Epstein (b. 1937)