Landram Michael J, Halligan Mary K
Department of Exercise Science and Sport, The University of Scranton.
Department of Physical Therapy, The University of Scranton.
J Can Chiropr Assoc. 2020 Dec;64(3):227-236.
To differentiate running intensity and menstrual phase effects on knee stability before and after exercise.
Ten eumenorrheic aerobically trained females were recruited to determine effects of a randomized crossover design of exercise intensity (85%HRR vs 42.5%HRR) on anterior cruciate ligament laxity (AP) and hamstrings flexibility (HF). A KT-2000 arthrometer measured AP and a 90-90 supine knee extension (MKE) and sit-and-reach test (SRD) measured HF in follicular (FP) and luteal (LP) menstrual cycle phases.
Significant difference pre-exercise was observed for both 90N and 120N AP in LP compared to FP. Exercise increased AP at 90N and 120N in both FP and LP with LP exhibiting larger changes than FP. MKE and SRD increased significantly following exercise but were not different across menstrual phases or between exercise intensities.
AP taken together with increased HF post-exercise demonstrates a less stable knee joint in the LP before and following exercise.
区分运动前后跑步强度和月经周期阶段对膝关节稳定性的影响。
招募10名月经周期正常且接受过有氧训练的女性，以确定运动强度（85%心率储备[HRR]与42.5%HRR）的随机交叉设计对前交叉韧带松弛度（AP）和腘绳肌柔韧性（HF）的影响。使用KT-2000关节测量仪测量AP，通过90-90仰卧位膝关节伸展（MKE）和坐位体前屈试验（SRD）测量卵泡期（FP）和黄体期（LP）月经周期阶段的HF。
与卵泡期相比，黄体期90N和120N的AP在运动前存在显著差异。运动使卵泡期和黄体期90N和120N的AP均增加，且黄体期的变化大于卵泡期。运动后MKE和SRD显著增加，但在月经周期阶段或运动强度之间无差异。
运动后AP增加以及HF增加表明，黄体期运动前后膝关节稳定性较差。
