Lower limb strength and flexibility in athletes with and without patellar tendinopathy.
OBJECTIVE
To compare the hip, knee and ankle torques, as well as knee and ankle flexibility between athletes with patellar tendinopathy and asymptomatic controls.


METHODS
Cross-sectional study.


METHODS
Laboratory setting.


METHODS
Fourteen male volleyball, basketball or handball athletes, divided into 2 groups, patellar tendinopathy group (TG; n = 7) and asymptomatic control group (CG; n = 7).


METHODS
Hip, knee and ankle isometric torques were measured with a handheld dynamometer. Weight-bearing ankle dorsiflexion, hamstring and quadriceps flexibility were measured with a gravity inclinometer.


RESULTS
The TG had 27% lower hip extensor torque when compared to the CG (P = 0.031), with no group differences in knee and ankle torques (P > 0.05). Also, the TG had smaller weight-bearing ankle dorsiflexion (P = 0.038) and hamstring flexibility (P = 0.006) when compared to the CG. Regarding quadriceps flexibility, no group differences were found (P = 0.828).


CONCLUSIONS
Strength and flexibility deficits might contribute to a greater overload on the knee extensor mechanism, possibly contributing to the origin/perpetuation of patellar tendinopathy. Interventions aiming at increasing hip extensors strength as well as ankle and knee flexibility might be important for the rehabilitation of athletes with patellar tendinopathy.
Department of Physical Therapy, Federal University of São Carlos, São Carlos, Brazil.
Rodrigo
R
Scattone Silva
Department of Physical Therapy, Federal University of São Carlos, São Carlos, Brazil.
Theresa H
TH
Nakagawa
Department of Physical Therapy, Federal University of São Carlos, São Carlos, Brazil.
Ana Luisa G
AL
Ferreira
Department of Physical Therapy, Federal University of São Carlos, São Carlos, Brazil.
Luccas C
LC
Garcia
Department of Medicine, Federal University of São Carlos, São Carlos, Brazil.
José E M
JE
Santos
Department of Physical Therapy, Federal University of São Carlos, São Carlos, Brazil. Electronic address: fserrao10@gmail.com.
Fábio V
FV
Serrão
D000293:Adolescent; D000328:Adult; D001265:Athletic Injuries / Q000503:physiopathology*; D001490:Basketball / Q000293:injuries; D001696:Biomechanical Phenomena / Q000502:physiology; D003430:Cross-Sectional Studies; D006801:Humans; D007537:Isometric Contraction / Q000502:physiology; D035002:Lower Extremity / Q000502:physiology*; D008297:Male; D053580:Muscle Strength / Q000502:physiology*; D053581:Muscle Strength Dynamometer; D010329:Patella / Q000503:physiopathology*; D016059:Range of Motion, Articular / Q000502:physiology; D052256:Tendinopathy / Q000503:physiopathology*; D019415:Torque; D054798:Volleyball / Q000293:injuries; D016474:Weight-Bearing / Q000502:physiology
Biomechanics; Jumper's knee; Overload; Tendon