Escamilla Rafael F, Zheng Naiquan, MacLeod Toran D, Imamura Rodney, Edwards W Brent, Hreljac Alan, Fleisig Glenn S, Wilk Kevin E, Moorman Claude T, Paulos Lonnie, Andrews James R
Department of Physical Therapy, California State University, Sacramento, CA, USA.
Clin Biomech (Bristol). 2010 Mar;25(3):213-21. doi: 10.1016/j.clinbiomech.2009.11.003. Epub 2009 Dec 9.
Although weight bearing lunge exercises are frequently employed during anterior cruciate ligament and posterior cruciate ligament rehabilitation, cruciate ligament tensile forces are currently unknown while performing forward and side lunge exercises with and without a stride.
Eighteen subjects used their 12 repetition maximum weight while performing a forward lunge and side lunge with and without a stride. A motion analysis system and biomechanical model were used to estimate cruciate ligament forces during lunging as a function of 0-90 degrees knee angles.
Comparing the forward lunge to the side lunge across stride variations, mean posterior cruciate ligament forces ranged between 205 and 765N and were significantly greater (P<0.0025) in the forward lunge long at 40 degrees , 50 degrees , 60 degrees , 70 degrees , and 80 degrees knee angles of the descent phase and at 80 degrees , 70 degrees , 60 degrees knee angles of the ascent phase. There were no significant differences (P<0.0025) in mean posterior cruciate ligament forces between with and without stride differences across lunging variations. There were no anterior cruciate ligament forces quantified while performing forward and side lunge exercises.
Clinicians should be cautious in prescribing forward and side lunge exercises during early phases of posterior cruciate ligament rehabilitation due to relatively high posterior cruciate ligament forces that are generated, especially during the forward lunge at knee angles between 40 degrees and 90 degrees knee angles. Both the forward and side lunges appear appropriate during all phases of anterior cruciate ligament rehabilitation. Understanding how forward and side lunging affect cruciate ligament loading over varying knee angles may help clinicians better prescribe lunging exercises in a safe manner during anterior cruciate ligament and posterior cruciate ligament rehabilitation.
尽管在前后交叉韧带康复过程中经常采用负重弓步练习，但在进行有步幅和无步幅的前弓步和侧弓步练习时，交叉韧带的拉力目前尚不清楚。
18名受试者在进行有步幅和无步幅的前弓步和侧弓步练习时，使用其12次重复的最大重量。使用运动分析系统和生物力学模型来估计弓步过程中交叉韧带的力，该力是膝关节角度在0至90度之间的函数。
在有步幅变化的情况下，将前弓步与侧弓步进行比较，后交叉韧带的平均力在205至765N之间，在下降阶段膝关节角度为40度、50度、60度、70度和80度以及上升阶段膝关节角度为80度、70度、60度时，前弓步的后交叉韧带平均力明显更大（P<0.0025）。在有步幅和无步幅差异的弓步变化中，后交叉韧带的平均力没有显著差异（P<0.0025）。在前弓步和侧弓步练习过程中，未对前交叉韧带的力进行量化。
由于产生的后交叉韧带力相对较高，尤其是在前弓步膝关节角度在40度至90度之间时，临床医生在前后交叉韧带康复的早期阶段开前弓步和侧弓步练习处方时应谨慎。在前交叉韧带康复的所有阶段，前弓步和侧弓步似乎都是合适的。了解前弓步和侧弓步在不同膝关节角度下如何影响交叉韧带负荷，可能有助于临床医生在前交叉韧带和后交叉韧带康复期间以安全的方式更好地开弓步练习处方。
