一、少儿常见途中跑错误 (一)上身躯干较直,重心较高,前摆下压落地前有较明显的前脚掌(跖屈绷脚背,“踝角”较大)下落,后扒折叠小腿不明显。前抬摆时前脚掌落地前预备的“踝角”较大,会致使落地点太近,缓冲时间相对加长,重心易高,后扒时间相对而言不充分,是造成后划小腿不能顺畅折叠的原因,看似步频不慢,其实损失了步幅,而且容易受伤。 (二)不能充分送髋,不能充分获得水平分力损失了步幅。在塑胶跑道上,由于向上的作用力增强,越是后蹬扒角度大(靠近地面的垂直线),重心靠中,那么向上的反作用力越大,致使腾空时间延长,步频受到明显 First, the children common mistake on the way (A) upper body trunk straight, higher center of gravity before the pressure placed before the more obvious forefoot (plantar flexion feet, “ankle angle ” larger) drop, Folding leg is not obvious. Before lifting the front foot before the landing preparation “ankle angle ” larger, will cause the landing point is too close, the buffer time is relatively longer, the center of gravity is higher, the rear grill relatively speaking is not sufficient, The reason for smooth folding, it seems that the pace is not slow, in fact, lost the pace, and easily hurt. (B) can not be fully sent hip, can not fully get the level of force lost the pace. In the plastic track, due to the upward force increases, the more rear stepping grilled angle (near the vertical line of the ground), the center of gravity by the middle, then the upward reaction force is larger, resulting in extended vacating time, the pace of the obvious