提高弯道跑的技巧。应从两方面着手。首先， 提高弯道跑的技术。整个身体（不只是上体），应向左倾斜，以便利用重力产生向心力，克服离心力。摆臂时，左臂向前摆的幅度较大，手稍向内；向后摆时，幅度较小，肘稍向外。左臂向后摆时幅度较大。右腿前摆时，膝应稍向内扣；左腿前 Improve cornering skills. Should start from two aspects. First of all, improve the technology of cornering. The entire body (not just the upper body) should be tilted to the left in order to generate centripetal force using gravity to overcome centrifugal force. When swinging the arm, the amplitude of his left arm is larger and the hand is slightly inward; when it is swung back, the amplitude is smaller and the elbow is slightly outward. When the left arm swing back to a larger amplitude. Before the right leg swing, the knee should be slightly inward buckle; left leg before