Hip and pelvis kinematics during a stork test in sports participants with unilateral adductor related groin pain

[摘要] ENGLISH ABSTRACT: IntroductionGroin pain is one of the three most prevalent injuries obtained in sports such as soccer;Australian Rule football; Rugby Leagues and Ice Hockey. Research on the hip and pelvisbiomechanics in adductor related groin pain in sport is scarce.ObjectiveThe purpose of this study was to determine if there are any differences in the hip and pelviskinematics during the ten seconds Stork Test in sports participants with unilateral groin paincompared to their healthy matched controls.MethodologyA descriptive study was conducted. Eighteen active sports participants were recruited fromsoccer and rugby clubs situated around the Cape Peninsula, Western Cape, South Africa.The three-dimensional (3D) hip and pelvis kinematics of nine cases with unilateral groin painand ten healthy controls were analysed. Hip and pelvis kinematics were analysed in theCAF-3D Vicon Laboratory at Stellenbosch University, using an eight camera Vicon system.A positive adductor squeeze test was used as a diagnostic test during participant screeningto include cases with unilateral groin pain. Each participant performed six ten second StorkTests, three on the right and three on the left. The main outcome measures were 3D hip andpelvis kinematic from foot lift to foot contact, foot contact was defined as a moment duringthe movement when the vertical force on the plate exceeded a threshold of 30 N. Each ofthe unilateral groin pain cases were compared to their healthy matched controls.Descriptive statistical techniques were used for all outcome measures; means and standarddeviation (SD) was calculated, followed by a Student's t-test to determine significantdifferences between the cases and controls. For all outcomes with p-values equal to orbelow 0.05, the effect size was calculated using the Cohen's D.ResultsThe findings of this study indicated a significant increase (p=0.03) in the anterior/posteriorpelvic tilt total range of motion of the unilateral groin pain cases in the sagittal planecompared to their matched healthy controls. Significantly increased (p=0.05)internal/external rotation of the pelvis was noted in the transverse plane in unilateral groinpain cases compared to their healthy controls.ConclusionDifferences were found in the total range of motion in the pelvis between sports participantswith unilateral adductor related groin pain and their matched controls. This may imply thatthe groin pain participants have a decreased ability to activate the stabilisers of the pelvis,adductors, abdominals and gluteus medius, in order to stabilise the pelvis during themovement. A possible reason for the decreased muscle control in the affected group can bedecreased muscle strength or muscle inhibition due to pain. The findings may also implythat evaluation and rehabilitation of pelvis stability should be included in individuals sufferingfrom groin pain. Future research should focus on exploring these muscular componentsduring the Stork test, perhaps making use of EMG.

[发布机构] Stellenbosch University