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


Autoria(s): Nakagawa, Theresa H.; Moriya, Erika T. U.; Maciel, Carlos Dias; Serrao, Fabio V.
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

05/11/2013

05/11/2013

2012

Resumo

STUDY DESIGN: Controlled laboratory study using a cross-sectional design. OBJECTIVES: To determine whether there are any differences between the sexes in trunk, pelvis, hip, and knee kinematics, hip strength, and gluteal muscle activation during the performance of a single-leg squat in individuals with patellofemoral pain syndrome (PFPS) and control participants. BACKGROUND: Though there is a greater incidence of PFPS in females, PFPS is also quite common in males. Trunk kinematics may affect hip and knee function; however, there is a lack of studies of the influence of the trunk in individuals with PFPS. METHODS: Eighty subjects were distributed into 4 groups: females with PFPS, female controls, males with PFPS, and male controls. Trunk, pelvis, hip, and knee kinematics and gluteal muscle activation were evaluated during a single-leg squat. Hip abduction and external rotation eccentric strength was measured on an isokinetic dynamometer. Group differences were assessed using a 2-way multivariate analysis of variance (sex by PFPS status). RESULTS: Compared to controls, subjects with PFPS had greater ipsilateral trunk lean (mean +/- SD, 9.3 degrees +/- 5.30 degrees versus 6.7 degrees +/- 3.0 degrees; P = .012), contralateral pelvic drop (10.3 degrees +/- 4.7 degrees versus 7.4 degrees 3.8 degrees; P = .003), hip adduction (14.8 degrees +/- 7.8 degrees versus 10.8 degrees +/- 5.6 degrees; P<.0001), and knee abduction (9.2 degrees +/- 5.0 degrees versus 5.8 degrees +/- 3.4 degrees; P<.0001) when performing a single-leg squat. Subjects with PFPS also had 18% less hip abduction and 17% less hip external rotation strength. Compared to female controls, females with PFPS had more hip internal rotation (P<.05) and less muscle activation of the gluteus medius (P = .017) during the single-leg squat. CONCLUSION: Despite many similarities in findings for males and females with PFPS, there may be specific sex differences that warrant consideration in future studies and when clinically evaluating and treating females with PFPS. J Orthop Sports Phys Ther 2012;42(6):491-501, Epub 8 March 2012. doi:10.2519/jospt.2012.3987

Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)

Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)

Identificador

JOURNAL OF ORTHOPAEDIC & SPORTS PHYSICAL THERAPY, ALEXANDRIA, v. 42, n. 6, pp. 491-501, JUN, 2012

0190-6011

http://www.producao.usp.br/handle/BDPI/41413

10.2519/jospt.2012.3987

http://dx.doi.org/10.2519/jospt.2012.3987

Idioma(s)

eng

Publicador

J O S P T,

ALEXANDRIA

Relação

JOURNAL OF ORTHOPAEDIC & SPORTS PHYSICAL THERAPY

Direitos

restrictedAccess

Copyright J O S P T,

Palavras-Chave #ANTERIOR KNEE PAIN #BIOMECHANICS #ELECTROMYOGRAPHY #PATELLA #LOWER-EXTREMITY KINEMATICS #JOINT COORDINATE SYSTEM #GENDER-DIFFERENCES #LATERAL TRUNK #CONTACT PRESSURES #CLINICAL-TRIAL #ECCENTRIC HIP #ABNORMAL HIP #RISK-FACTORS #MECHANICS #ORTHOPEDICS #REHABILITATION #SPORT SCIENCES
Tipo

article

original article

publishedVersion