Hello, my friend! I am a sports madman. I have been engaged in teaching and training for 20 years and I am glad to serve you. Your question: the technique of breaking thighs and legs in sprint? Specific situation: how to fold long legs is reasonable? The larger the angle. . . Does it mean that the faster the pace? Let's talk about the training method or effect of calf folding. My answer: Hello! In short distance running, the folding technique of thighs and legs is very important, and its direct influence is the stride length. As we all know, there are two aspects of sprint that directly affect your speed, namely, stride length and stride frequency. Our pursuit of promotion in these two aspects is the focus of sprint training. Improving any one indicator will improve your performance. If you improve both indicators at the same time, your performance will advance by leaps and bounds. Tape practice method: 1, lift thigh 2, lift folding 3, lift thigh 4 supine, fold and swing prone calf: 1, swing leg 2, swing leg 3, swing leg 3, I wish you happiness! Health!