田径项目的各种练习 ,运作结构不尽相同 ,活动性质、强度也有较大差别 ,既有周期性和非周期性练习 ,也有混合性练习。但在教学实践中 ,任何技术动作的学习与掌握都需依赖于大量的身体练习。在田径教学中 ,尽管田径技术动作各异 ,身体练习的要素理论认为 ,任何田径动作练习包括? Track and field project of various exercises, the operation of the structure is not the same, the nature of the activity, there are great differences in strength, both periodic and non-periodic exercises, but also mixed exercises. However, in teaching practice, any technical action learning and mastery need to rely on a large number of physical exercises. In track and field teaching, although track and field technique moves differently, the elemental theory of body practice holds that any track and field practice includes?