Running is a physical activity that allows people to cover distances at a more rapid pace than walking. Running is usually classified as a gait in which both of the runner’s legs are in the air between strides, whereas a person who is walking almost always has one foot touching the ground. A person who is running also keeps his or her legs straighter than when walking. Running can refer to a variety of speeds, including fast-paced sprinting and slower-paced jogging. Competitive running covers distances as short as 100 meters and as far as 300 kilometers in endurance sports such as the twenty-four-hour ultramarathon. Running is also a significant factor in other competitive sports, such as basketball and soccer.
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