The 4 Hour Bodyby Parker on TwosHow to run: 1. Use gravity (via forward lean) for forward motion. 2. Land on the balls of your feet and have the feet land under your center of gravity. 3. Never fully straighten your legs. 4. Pull each foot off the ground and towards your buttocks using the hamstrings as soon as it passes under your center of gravity. 5. Maintain at least a 180 step per minute rate.Strength is a skill.