1, head: the line of sight is in front of the timer, and the head should not be forward or backward;

2. Shoulders: Shoulders are prone to drooping, so don't run with your shoulders;

3, chest: stand up, stand upright, avoid running with your chest;

4. Arm: Bend the elbow 90 degrees, follow the principle of "no elbow in front, no hand in the back", and don't swing from side to side;

5, hands: hands relax and make a fist, fingers can gently touch the palm;

6. Trunk: keep your back straight, keep the central axis of your body stable, and don't shake or fluctuate too much;

7. Hips: Don't twist your hips and waist excessively to reduce the chance of injury and energy consumption;

8. Knee: When the sole of the foot touches the ground, the knee joint should be slightly bent to reduce the impact between bones;

9. Ankle: Keep the ankle relaxed, and try not to evert or excessively evert, so as not to increase the risk of injury;

10, sole: small step distance and high step frequency, so that the weight can be quickly transferred to the feet touching the ground.