Introduction: Knee plica is a fold of synovial tissue in knee joint, which can get in some cases inflamed and developed into synovial plica syndrome. It's mostly treated conservatively, but if that way is unsuccessful the doctor does arthroscopic resection of plica. Purpose: Purpose of this case report with patient after plica resection is to find out to what extent we can improve muscle performance and knee function. Methods: Patient was involved in a seven-week individual exercise therapy program. Measurement protocol consisted of Y balance test, anthropometric measurements (range of motion, circumference of lower limb, skinfold measurement) and isokinetic knee muscle testing at 60 and 180°/s of angular velocity. Results: After finished training anterior component of Y balance test increased by 7 cm, posterolateral component by 1,5 cm and posteromedial component increased by 6,5 cm. Knee extensors of injured leg developed 14% more torque and did 2% more work, knee flexors developed 5% more torque and did 14% more work at 60°/s of angular velocity. At 180°/s of angular velocity knee extensors developed 15% more torque and torque of knee flexors decreased by 6,7%. Discussion and conclusion: Even though we didn't reach perceptual hypertrophy of injured leg's quadriceps muscle, stability of the knee joint improved, which was goal of our training program. Patient reported better knee stability even during jumps and free time activities.
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