Lahner Matthias, von Schulze Pellengahr Christoph, Walter Philipp Alexander, Lukas Carsten, Falarzik Andreas, Daniilidis Kiriakos, von Engelhardt Lars Victor, Abraham Christoph, Hennig Ewald M, Hagen Marco
Department of Orthopaedic Surgery, Ruhr-University Bochum, St, Josef-Hospital, Gudrunstr, 56, 44791 Bochum, Germany.
BMC Musculoskelet Disord. 2014 Mar 16;15:88. doi: 10.1186/1471-2474-15-88.
Femoroacetabular impingement (FAI) is predominant in young male athletes, but not much is known about gait differences in cases of increased hip alpha angles. In our study, the hip alpha angle of Nötzli of soccer players was quantified on the basis of magnetic resonance imaging (MRI) with axial oblique sequences. The aim of the current study was to compare the rearfoot motion and plantar pressure in male semiprofessional soccer players with increased alpha angles to age-matched amateur soccer players.
In a prospective analysis, male semiprofessional and amateur soccer players had an MRI of the right hip to measure the alpha angle of Nötzli. In a biomechanical laboratory setting, 14 of these participants in each group ran in two shoe conditions. Simultaneously in-shoe pressure distribution, tibial acceleration, and rearfoot motion measurements of the right foot were performed.
In the semiprofessional soccer group, the mean value of the alpha angle of group was 55.1 ± 6.58° (range 43.2-76.6°) and 51.6 ± 4.43° (range 41.9-58.8°) in the amateur group. In both shoe conditions, we found a significant difference between the two groups concerning the ground reaction forces, tibial acceleration, rearfoot motion and plantar pressure parameters (P < 0.01, P < 0.05, P = 0.04). Maximum rearfoot motion is about 22% lower in the semiprofessional group compared to the amateur group in both shoe conditions.
This study confirmed that semiprofessional soccer players with increased alpha angles showed differences in gait kinematics compared to the amateur group. These findings support the need for a screening program for competitive soccer players. In cases of a conspicuous gait analysis and symptomatic hip pain, FAI must be ruled out by further diagnostic tests.
股骨髋臼撞击症（FAI）在年轻男性运动员中较为常见，但对于髋臼α角增大情况下的步态差异了解不多。在我们的研究中，基于磁共振成像（MRI）的轴向斜位序列对足球运动员的髋臼α角进行了量化。本研究的目的是比较髋臼α角增大的男性半职业足球运动员与年龄匹配的业余足球运动员的后足运动和足底压力。
在一项前瞻性分析中，男性半职业和业余足球运动员接受了右髋MRI检查以测量髋臼α角。在生物力学实验室环境中，每组中的14名参与者在两种鞋类条件下跑步。同时进行右脚的鞋内压力分布、胫骨加速度和后足运动测量。
在半职业足球组中，该组髋臼α角的平均值为55.1±6.58°（范围43.2 - 76.6°），业余组为51.6±4.43°（范围41.9 - 58.8°）。在两种鞋类条件下，我们发现两组在地面反作用力、胫骨加速度、后足运动和足底压力参数方面存在显著差异（P < 0.01，P < 0.05，P = 0.04）。在两种鞋类条件下，半职业组的最大后足运动比业余组低约22%。
本研究证实，髋臼α角增大的半职业足球运动员与业余组相比，步态运动学存在差异。这些发现支持对职业足球运动员进行筛查计划的必要性。在步态分析明显异常且伴有髋部疼痛症状的情况下，必须通过进一步的诊断测试排除FAI。
