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How to Start a Running Program
Running is executed as a sequence of strides, which
alternate between the two legs. Each leg's stride
can be roughly divided into three phases: support,
drive, and recovery. Support and drive occur when
the foot is in contact with the ground. Recovery
occurs when the foot is off the ground. Since only
one foot is on the ground at a time in running, one
leg is always in recovery, while the other goes
through support and drive. Then, briefly, as the
runner leaps through the air, both legs are in
recovery.
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