论文部分内容阅读
在日常教学和训练中,常见有的教师将沙袋缚在学生的腿上进行跑、跳等下肢练习,或将沙袋缚在学生小臂上进行摆臂等上肢练习。采用此种方法的确能提高身体某一部位的力量或某些技术动作的质量。但是,此方法对少年儿童不太适宜,往往会产生不良影响。首先,少年儿童由于正处于身体发育阶段。骨骼中有机物成分较多,钙、磷等无机成分较少,骨质柔软,不易折断,但易变形。在这个时期常缚沙袋训练,局部负担过重,就可能导致骨骼变形而影响正常的身体发育。其次,少年儿童力量较差,大脑皮层运动中枢尚未完善,技术也很不成熟,有许多动作往往还未形成正确的动力定型。在这种情况下进行负重技术练习,给身
In daily teaching and training, some teachers often tie the sandbags to the students ’legs to practice lower extremities such as running, jumping or the like, or bind the sandbags to the students’ lower limbs to exercise upper limbs such as swing arms. Using this method can indeed improve the strength of a body part or the quality of certain technical actions. However, this method is not suitable for children, often have adverse effects. First of all, children are in the stage of physical development. Skeleton organic matter more calcium, phosphorus and other inorganic components less soft bone, not easy to break, but easy to deform. During this period often tied sandbags training, local overburdened, it may lead to bone deformation and affect normal body development. Second, children and adolescents have poorer capabilities, the motor center of the cerebral cortex has not yet been improved, and the technology is also immature. Many movements often do not form the correct dynamic shaping. Under such circumstances weight-bearing technical exercises, to the body