CAJ | 학술논문

半蹲挺技术近30年来无人进行深入研究,但近期运用该技术取得优异成绩的运动员在增加。运用三维运动学的方法以石智勇为研究对象,对其半蹲挺技术进行运动学特征研究。结果表明：半蹲挺技术在预蹲阶段应采取膝关节、髋关节角度同时减小的＂双屈式＂预蹲技术;在预蹲时角速度变化上应采用缓慢-加速-减速的节奏,采取积极预蹲为后面发力创造有利条件;在上挺发力阶段,膝关节、髋关节角度变化方向应一致,且应同时达到最大角度,以更好的实现身体的协调用力;半蹲挺与箭步挺相比在杠铃回落距离上并未体现出明显差异,但相对箭步挺,半蹲挺有着更低的撑铃位置,举起同样重量的杠铃时可以有效减少做功,在发力时对杠铃速度的要求相对箭步挺也相对较低;由于半蹲挺在发力时前后支撑面积远小于箭步挺,对运动员的平衡性和柔韧性提出了更高的要求;半蹲挺与下蹲挺相比杠铃回落距离更短,可以有效降低杠铃下砸力。
반준정기술근30년래무인진행심입연구,단근기운용해기술취득우이성적적운동원재증가。운용삼유운동학적방법이석지용위연구대상,대기반준정기술진행운동학특정연구。결과표명：반준정기술재예준계단응채취슬관절、관관절각도동시감소적＂쌍굴식＂예준기술;재예준시각속도변화상응채용완만-가속-감속적절주,채취적겁예준위후면발력창조유리조건;재상정발력계단,슬관절、관관절각도변화방향응일치,차응동시체도최대각도,이경호적실현신체적협조용력;반준정여전보정상비재강령회락거리상병미체현출명현차이,단상대전보정,반준정유착경저적탱령위치,거기동양중량적강령시가이유효감소주공,재발력시대강령속도적요구상대전보정야상대교저;유우반준정재발력시전후지탱면적원소우전보정,대운동원적평형성화유인성제출료경고적요구;반준정여하준정상비강령회락거리경단,가이유효강저강령하잡력。
Three -dimensional kinematic approach is used to study the half squatting jerk technique of Shi Zhiyong in the 1 0th National Games.The results showed that half squatting jerk technique in the pre-squat stage should bend both the angles of knee and hip,and the angular speed changes follow the rhythm of slow-acceleration-Deceleration,taking positive pre-squatting to create favorable conditions for pull;in the pull jerk stage,the changes of knee and hip angles should be consistent in direction and should also reach the maximum angle in order to achieve better body coordination;for half squatting jerk and split jerk,there is no significant differences in barbell down distance,but the half squatting jerk has a lower bell brace position,which can effectively reduce the work done when lifting barbells of the same weight and also has less speed requirements on barbells;Because the support stride of half squatting is much smaller than split jerk when pull,it has higher requirements on the balance and flexibility of athletes;half squatting compared with split jerk has shorter barbell down distance,which can effectively reduce the bar smashing force.