Article

OBJECTIVE: To investigate the differences in hip movement patterns during
different daily and athletic activities in persons with cam-type femoroacetabular
impingement (FAI) with and without cartilage lesions compared with control
subjects in a preliminary study. DESIGN: Controlled laboratory study using a
cross-sectional design. SETTING: Research institution with a tertiary care
medical center. PARTICIPANTS: Fifteen subjects [M:F, 13:2; age, 31.6 +/- 9.7
years (range, 22-52 years); body mass index, 24.9 +/- 4.6 (range, 18.8-38.4);
FAI:control, 7:8]. METHODS: All subjects had 3-Tesla magnetic resonance imaging
of the hip and also underwent 3-dimensional motion capture during walking,
deep-squat, and drop-landing tasks. Experienced radiologists graded cartilage
lesions on clinical magnetic resonance images. OUTCOMES: Peak kinematic and
kinetic variables were compared between subjects who did and did not have FAI,
and subjects who had FAI and cartilage lesions were compared with subjects who
did not have cartilage lesions. RESULTS: Subjects who had FAI demonstrated no
significant differences for walking or drop landing compared with control
subjects. However, during the deep-squat task, subjects with FAI adducted more
and had a greater internal rotation moment. Subjects who had cartilage lesions in
the presence of a cam lesion demonstrated (1) no difference for walking; (2)
greater adduction, greater internal rotation moment, and lower transverse plane
range of motion during the deep-squat task; and (3) greater adduction and lower
internal rotation during the drop-landing task compared with subjects who did not
have cartilage lesions. CONCLUSIONS: We observed differences in movement patterns
between subjects who had FAI compared with control subjects. However, the
differences were more pronounced between subjects with FAI who had cartilage
lesions compared with subjects who did not have cartilage lesions. These findings
highlight the importance of understanding the complex interplay between bony
morphologic features, cartilage lesions, and movement patterns in persons with cam-type FAI.
CI - Copyright (c) 2014 American Academy of Physical Medicine and Rehabilitation.
Published by Elsevier Inc. All rights reserved.

Langue : ANGLAIS