Scholtes Sara A, Salsich Gretchen B
Saint Louis University, St. Louis, MO, USA.
Int J Sports Phys Ther. 2017 Jun;12(3):333-340.
Two=dimensional motion analysis of lower=extremity movement typically focuses on the knee frontal plane projection angle, which considers the position of the femur and the tibia. A measure that includes the pelvis may provide a more comprehensive and accurate indicator of lower=extremity movement. Hypothesis/Purpose: The purpose of the study was to describe the utility of a two=dimensional dynamic valgus index (DVI) in females with patellofemoral pain. The hypothesis was that the DVI would be more reliable and valid than the knee frontal plane projection angle, be greater in females with patellofemoral pain during a single=limb squat than in females without patellofemoral pain, and decrease in females with patellofemoral pain following instruction. Study Design: Controlled Laboratory Study.
Data were captured while participants performed single limb squats under two conditions: usual and corrected. Two=dimensional hip and knee angles and a DVI that combined the hip and knee angles were calculated. Three=dimensional sagittal, frontal, and transverse plane angles of the hip and knee and a DVI combining the frontal and transverse plane angles were calculated.
The two=dimensional DVI demonstrated moderate reliability (ICC=0.74). The correlation between the two=dimensional and three=dimensional DVI's was 0.635 (p<0001). Females with patellofemoral pain demonstrated a greater two=dimensional DVI (31.14 °±13.36 °) than females without patellofemoral pain (18.30 °±14.97 °; p=0.010). Females with patellofemoral pain demonstrated a decreased DVI in the corrected (19.04 °±13.70 °) versus usual (31.14 °±13.36 °) condition (p=0.001).
The DVI is a reliable and valid measure that may provide a more comprehensive assessment of lower=extremity movement patterns than the knee frontal plane projection angle in individuals with lower=extremity musculoskeletal pain problems.
2b.
下肢运动的二维运动分析通常侧重于膝关节额状面投影角度，该角度考虑了股骨和胫骨的位置。一种包含骨盆的测量方法可能会提供一个更全面、准确的下肢运动指标。假设/目的：本研究的目的是描述二维动态外翻指数（DVI）在患有髌股疼痛的女性中的效用。假设是DVI将比膝关节额状面投影角度更可靠、有效，在单腿深蹲时，患有髌股疼痛的女性的DVI将比没有髌股疼痛的女性更大，并且在接受指导后，患有髌股疼痛的女性的DVI会降低。研究设计：对照实验室研究。
在两种条件下（通常状态和纠正状态）让参与者进行单腿深蹲时收集数据。计算二维髋关节和膝关节角度以及一个结合了髋关节和膝关节角度的DVI。计算髋关节和膝关节的三维矢状面、额状面和横断面角度以及一个结合了额状面和横断面角度的DVI。
二维DVI显示出中等可靠性（组内相关系数=0.74）。二维和三维DVI之间的相关性为0.635（p<0.001）。患有髌股疼痛的女性的二维DVI（31.14°±13.36°）高于没有髌股疼痛的女性（18.30°±14.97°；p=0.010）。患有髌股疼痛的女性在纠正状态下（19.04°±13.70°）的DVI相较于通常状态下（31.14°±13.36°）有所降低（p=0.001）。
DVI是一种可靠且有效的测量方法，对于患有下肢肌肉骨骼疼痛问题的个体，它可能比膝关节额状面投影角度能更全面地评估下肢运动模式。
2b。
