If you walk with a partner, you can compare the distinctive parts of each other s walk. Running - Running is the transfer of weight from one foot to the other with a slight loss of contact with the ground by both feet. The body leans slightly forward, arms bent at the elbows swinging forward and backward from the shoulders and moving in opposition to the leg movements. The knees are bent and the heel of the foot contacts the ground and rolls to the toes of the foot. The run is flat-footed with minimum flight.
Spinal rotation swings the arms bilaterally to counterbalance rotation of the pelvis and swing leg.
Running is well established by the time children enter school. Start by overcoming inertia. Lean forward about 20 degrees from vertical. Move the knees directly forward and upward and swing the arms forward and backward. Gradually pick up speed letting arms swing freely at about a 90-degree angle during the forward and backward arm swings.