正向和背向跑步支撑阶段髌股关节压力的比较

摘要

In order to further verify the magnitudes of patellofemoral joint compression forces (PFJCF) produced at the supporting stage of forward or backward running at the same speed, the author selected 8 healthy testees to par-ticipate in the test of forward and backward running at the same speed, collected kinematic and dynamic data of the running process, adopted inverse dynamic and PFJCF related calculation methods, and revealed the following find-ings: the difference between the ratio of PFJCF to body weight measured during forward running and the ratio of PFJCF to body weight measured during backward running was not significant, but the ratio of PFJCF to body weight measured during forward running was slightly greater than the ratio of PFJCF to body weight measured dur-ing backward running. ((3.57±0.43) BW; (3.14±0.92) BW;P>0.01). The author concluded that at the same running speed, backward running can be used as an exercise means to alleviate PFJCF, probably because backward running can appropriately reduce PFJCF, since PFJCF is mainly determined by the magnitude of knee joint muscle torque, and the magnitude of ground reaction force.%为了进一步验证在相同的跑步速度下，正向和背向跑步支撑阶段髌股关节压力(PFJCF)大小，选择了8名健康的受试者在相同的速度下参与正向和背向跑步测试。采集跑步过程的运动学和动力学数据，采用逆向动力学和PFJCF相关计算方法，结果显示，正向跑步比背向跑步相对体重PFJCF值差异不显著，但正向跑步比背向跑步相对体重PFJCF值略大((3.57±0.43) BW；(3.14±0.92)BW；P>0.01)。结论认为，在相同的跑步速度下，背向跑步可以用来作为减缓 PFJCF的运动手段，可能归因于背向跑步可以适当减轻PFJCF值，由于PFJCF主要取决于膝关节肌力矩的大小，以及地面反作用力的大小。