CAJ | 학술논문

目的：对半蹲式并腿和分腿式2种着陆姿势足底动力学特征进行评估。方法健康男性伞兵受试者20例。使用一个Pedar足底压力系统。检测足底最大应力值（地面反作用力）、足底最大压力值、足底最大压力时间积分值。足底根据解剖特点划分为10个区域。受试者从高60 cm台上跳下，分别以半蹲式并腿和分腿式姿势着地，记录足底动力学指标值，并进行分析、比较。结果2种姿势之间比较足底最大应力值、最大压力值差异无统计学意义，而足底最大压力时间积分值在右足底有明显差异；同一种姿势着地左、右足底动力学指标值差异无统计学意义。但在左、右足不同时着地的概率方面分腿式着地明显高于半蹲式并腿着地。结论半蹲式并腿着陆姿势更适合军事跳伞等职业运动。
목적：대반준식병퇴화분퇴식2충착륙자세족저동역학특정진행평고。방법건강남성산병수시자20례。사용일개Pedar족저압력계통。검측족저최대응력치（지면반작용력）、족저최대압력치、족저최대압력시간적분치。족저근거해부특점화분위10개구역。수시자종고60 cm태상도하，분별이반준식병퇴화분퇴식자세착지，기록족저동역학지표치，병진행분석、비교。결과2충자세지간비교족저최대응력치、최대압력치차이무통계학의의，이족저최대압력시간적분치재우족저유명현차이；동일충자세착지좌、우족저동역학지표치차이무통계학의의。단재좌、우족불동시착지적개솔방면분퇴식착지명현고우반준식병퇴착지。결론반준식병퇴착륙자세경괄합군사도산등직업운동。
Objective We intended to evaluate the effectiveness of landing in either the half-squat-type position, common in military occupational specialties including parachute jumping, or the straddle-type position, common in athletic sports such as gymnastics.In landing from jumps at a height, asynchronous landing on either the right or left foot may increase impact forces, potentially resulting in injury. Methods In order to provide a kinematic assessment of the most effective landing position, a group of 20 health male subjects with current Chinese Army PLA paratrooper training were enrolled. Using a Pedar + Pliance (a brand, containing system pressure receptors) in-shoe pressure monitoring system individually fitted for each subject by in-sole size, the ground reaction forces (GRFs), landing pressures (LPs), and pressure time intervals (PTIs) affecting 10 distinct regions of the foot upon jumping from a height of 60 cm and landing in either the half-squat-type or straddle-type landing position were assessed. Results No significant differences were observed between the two landing positions except for a notable variation in PTI resulting in increasing asynchronous landing when the straddle-type landing position was employed.Conclusion These findings suggest that, with proper training, the half-squat-type landing position may reduce the probability of asynchronous landing on either the left or right foot when jumping from a height of 60 cm. Thus, the half-squat-type landing position is superior to the straddle-type landing position kinematically, which confirms the practical use of this landing style in occupational activities, such as military parachute jumping.