High Quality Content by WIKIPEDIA articles! Running is a means for
an animal to move on foot. It is defined in sporting terms as a
gait in which at some point all feet are off the ground at the same
time. 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 rides along fairly smoothly on top of the legs.
The term running can refer to any of a variety of speeds ranging
from jogging to sprinting.