Is there a relationship between tracking ability

Authors: Hayri Baran Yosmaoglu Defne Kaya Hande Guney John Nyland Gul Baltaci Inci Yuksel Mahmut Nedim Doral

Publish Date: 2013/01/30

Volume: 21, Issue: 11, Pages: 2564-2571

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Abstract

The study included 43 women diagnosed with unilateral patellofemoral pain syndrome Thirtyone healthy women were recruited as control group Peak quadriceps femoris and hamstring muscle isokinetic torques were recorded at 60 and 180°/s Joint position sense was tested by active reproduction of joint position during horizontal squat performance Muscle coordination and motor control ability were tested by a multijoint lower limb trackingtrajectory test Muscle endurance was tested using a computerized functional squat system Severity of pain in during stair ascent/descent squatting and prolonged sitting with knees 90° flexed were measured using a 10 category modified visual analogue scale Functional levels of patients were determined using Kujala patellofemoral scoresActive reproduction of joint position did not differ between PFPS and control groups However trackingtrajectory error was significantly higher in PFPS group than control subjects Hamstring and quadriceps peak isokinetic torque and muscle endurance scores were significantly lower in the PFPS group Kujala patellofemoral score displayed significant relationships with peak isokinetic quadriceps torque knee pain and joint position sense scores Pain during stair descent sitting and quadriceps torque at 180°/s explained 577  of the variation in Kujala patellofemoral scoreAlthough lower extremity joint position sense did not differ between groups the PFPS group displayed a targettrajectory muscular coordination deficit decreased muscular endurance and decreased muscular strength compared to control group subjects Pain level directly related to motor control performance while joint position sense scores did not Knee pain and impaired strength related more to functional performance impairment than joint position sense scores in patients with PFPS

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