Relationship among eccentric hip and knee torques, symptom severity and functional capacity in females with patellofemoral pain syndrome

Trunk, Pelvis, Hip, and Knee Kinematics, Hip Strength, and Gluteal Muscle Activation During a Single-Leg Squat in Males and Females With and Without Patellofemoral Pain Syndrome

“…15,38 In addition, hip eccentric torque has been associated with functional capacity and pain level in females with PFPS. 33 Although males and females with PFPS showed diminished hip external rotation eccentric torque, only females with PFPS demonstrated increased hip internal rotation during the single-leg squat. Souza and Powers 43 reported that the greater hip internal rotation motion occurring during running in women with PFPS was associated with diminished hip muscle performance, especially hip extension endurance.…”

Avaliação isocinética, dor e funcionalidade de sujeitos com síndrome da dor patelofemoral

“…Powers et al 15 , suggest that the functional ability in people with PFPS is related to a higher quadriceps torque, given that the extensor torque was the only predictor of gait functioning, with a higher torque related to an improvement in the characteristics of the steps. In addition, Nakagawa et al 19 , found that the higher the knee eccentric extensor torque, the higher the functional capacity and the lower the pain intensity reported by the individuals with PFPS during the study's last week. Therefore, both the restoration of the strength of the muscle involved with knee functioning, especially the quadriceps, and the affected limb's regained capacity are important for the individual's recovery 24 .…”

“…The signs and symptoms of this syndrome are exacerbated especially during the performance of functional activities, among which we highlight the movements of going up and down the stairs and inclined surfaces 15,16 , which could result in the modification of locomotive patterns. Even so, this is a strategy adopted by these individuals in order to reduce muscle strain and, consequently, the pain [17][18][19] . These modifications in locomotive patterns may lead to alterations in the muscle strength of lower limbs, especially the quadriceps, given that this muscle is considered the knee's primary stabilizer during walking, especially during response to the load applied to it.…”

“…Some studies have been performed in order to evaluate the torque of knee flexors and extensors using isokinetic dynamometry on individuals with patellofemoral pain, but they differ in relation to test speed and contraction type 15,[18][19][20][21][22][23] . Some of these studies have associated the higher torque of knee flexors and extensors to a higher functional capacity in individuals with PFPS 15,19,24 .…”

“…Some of these studies have associated the higher torque of knee flexors and extensors to a higher functional capacity in individuals with PFPS 15,19,24 . In addition, only the study by Duffey et al, which evaluated the work of knee flexor and extensor muscles in individuals with PFPS, has been found to the present day.…”