Many people take up walking without thinking about how they walk. But your posture, your foot motion, your stride, and your use of arm motion make a big difference in your walking speed and ability to walk energetically.
Learning to use good walking posture will help you breathe deeper, relax your shoulders and neck, and avoid back and hip pain. By using the right arm and foot motion, you will propel yourself forward with power and without wasted effort.
You will use the same walking technique whether you walk on the sidewalk, on a track, or on the treadmill.