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儿童少年的体型与成年人不同,各器官、系统的形态和机能也有明显的差异。在安排体育活动和训练时应当注意下列特点。一、儿童少年运动器官系统的形态与机能特点运动器官系统包括骨骼、关节、肌肉。儿童少年骨体短细、骨质柔软、软骨成分较多。骨骼中有机成分与无机成分约各占一半,成人则约为3比7。因此儿童的骨骼弹性大,硬度小,不易折断而易变形。儿童少年关节面软骨相对较厚,关节囊和韧带的弹性强,关节周围的肌肉细长。因而关节的柔韧性良好,而牢固
Children and adolescents of different body size, the organs, the shape and function of the system there are significant differences. When arranging physical activity and training, you should pay attention to the following features. First, children’s juvenile sports organ system morphology and functional characteristics of the sports organ system including bones, joints, muscles. Children and adolescents with short body, soft bones, cartilage composition more. Skeleton organic and inorganic components account for about half of each adult is about 3 to 7. Therefore, children’s bones elasticity, hardness, easy to break and easy deformation. Articular cartilage in children and adolescents is relatively thick, the flexibility of the joint capsule and ligaments, slender muscles around the joints. The joints are therefore flexible and firm