Introduction to Running

The Merriam-Webster dictionary defines running as "to go faster than a walk; specifically: to go steadily by springing steps so that both feet leave the ground for an instant." The key is that both feet are in the air at the same time. By comparison, one foot is always in contact with the ground when you walk. Running is less efficient than walking, as mentioned earlier, precisely because you must propel your body weight through the air.

Jogging vs. Running

The movement is similar; running is just faster.