No Bending

Do not bend at the waist. This one of the most common problem runners have. If you bend at the waist, your center of mass will move back, your shoulders will slope down, and you neck will arch forward. All signs of bad posture. You need to keep your shoulders aligned with your hips and your ankles. This keeps all of your weight in one place and takes the load off your feet.

To prove how much harder it is to run with a bend. Try jumping up and down when you are bending at the waist. Now try with a larger bend. Now try with no bend. Which is easier? Now go run!!