在短跑运动员的选材中 ,教练员对运动员下肢解剖学特征提出的要求是 ,“大腿 (股骨 )相对短、骨盆相对窄、足弓相对较高。”他们认为此特征对于提高运动成绩有着较为重要的作用。但从静态的力学观点来看 ,这一特征会对运动员的步长产生消极的影响。本文试图运用运动生物力学的观点加以解释 ,以期达到使理论与实践相统一的目的 In the selection of sprinters, coaches asked athletes’ lower extremity anatomy features that “the thigh (femur) is relatively short, the pelvis is relatively narrow, and the arch is relatively high.” They consider this characteristic to be important in improving athletic performance Role. But from a static mechanistic point of view, this trait can have a negative effect on the athlete’s pace. This article attempts to use the viewpoint of sports biomechanics to explain, in order to achieve the purpose of the theory and practice of unity