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Hip strength and hip and knee kinematics during stair descent in females with and without patellofemoral pain syndrome.
J Orthop Sports Phys Ther 2008; 38(1):12-8JO

Abstract

STUDY DESIGN

Cross-sectional.

OBJECTIVE

To determine if females presenting with patellofemoral pain syndrome (PFPS) from no discernable cause other than overuse demonstrate hip weakness and increased hip internal rotation, hip adduction, and knee valgus during stair descent.

BACKGROUND

Historically, PFPS has been viewed exclusively as a knee problem. Recent findings have indicated an association between hip weakness and PFPS. Researchers have hypothesized that patients who demonstrate hip weakness would exhibit increased hip internal rotation, hip adduction, and knee valgus during functional activities. To date, researchers have not simultaneously examined hip and knee strength and kinematics in subjects with PFPS to make this determination.

METHODS AND MEASURES

Eighteen females diagnosed with PFPS and 18 matched controls participated. Strength measures were taken for the hip external rotators and hip abductors. Hip and knee kinematics were collected as subjects completed a standardized stair-stepping task. Independent t tests were used to determine between-group differences in strength and kinematics during stair descent.

RESULTS

Subjects with PFPS generated 24% less hip external rotator (P = .002) and 26% less hip abductor (P =. 006) torque. No between-group differences (P > .05) were found for average hip and knee transverse and frontal plane angles during stair descent.

CONCLUSION

Subjects with PFPS had significant hip weakness but did not demonstrate altered hip and knee kinematics as previously theorized. Additional investigations are needed to better understand the association between hip weakness and PFPS etiology.

Authors+Show Affiliations

Medical College of Georgia, School of Allied Health Sciences, Department of Physical Therapy, Augusta, GA, USA. lbolgla@mail.mcg.eduNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

18349475

Citation

Bolgla, Lori A., et al. "Hip Strength and Hip and Knee Kinematics During Stair Descent in Females With and Without Patellofemoral Pain Syndrome." The Journal of Orthopaedic and Sports Physical Therapy, vol. 38, no. 1, 2008, pp. 12-8.
Bolgla LA, Malone TR, Umberger BR, et al. Hip strength and hip and knee kinematics during stair descent in females with and without patellofemoral pain syndrome. J Orthop Sports Phys Ther. 2008;38(1):12-8.
Bolgla, L. A., Malone, T. R., Umberger, B. R., & Uhl, T. L. (2008). Hip strength and hip and knee kinematics during stair descent in females with and without patellofemoral pain syndrome. The Journal of Orthopaedic and Sports Physical Therapy, 38(1), pp. 12-8. doi:10.2519/jospt.2008.2462.
Bolgla LA, et al. Hip Strength and Hip and Knee Kinematics During Stair Descent in Females With and Without Patellofemoral Pain Syndrome. J Orthop Sports Phys Ther. 2008;38(1):12-8. PubMed PMID: 18349475.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Hip strength and hip and knee kinematics during stair descent in females with and without patellofemoral pain syndrome. AU - Bolgla,Lori A, AU - Malone,Terry R, AU - Umberger,Brian R, AU - Uhl,Timothy L, Y1 - 2007/11/21/ PY - 2008/3/20/pubmed PY - 2008/4/12/medline PY - 2008/3/20/entrez SP - 12 EP - 8 JF - The Journal of orthopaedic and sports physical therapy JO - J Orthop Sports Phys Ther VL - 38 IS - 1 N2 - STUDY DESIGN: Cross-sectional. OBJECTIVE: To determine if females presenting with patellofemoral pain syndrome (PFPS) from no discernable cause other than overuse demonstrate hip weakness and increased hip internal rotation, hip adduction, and knee valgus during stair descent. BACKGROUND: Historically, PFPS has been viewed exclusively as a knee problem. Recent findings have indicated an association between hip weakness and PFPS. Researchers have hypothesized that patients who demonstrate hip weakness would exhibit increased hip internal rotation, hip adduction, and knee valgus during functional activities. To date, researchers have not simultaneously examined hip and knee strength and kinematics in subjects with PFPS to make this determination. METHODS AND MEASURES: Eighteen females diagnosed with PFPS and 18 matched controls participated. Strength measures were taken for the hip external rotators and hip abductors. Hip and knee kinematics were collected as subjects completed a standardized stair-stepping task. Independent t tests were used to determine between-group differences in strength and kinematics during stair descent. RESULTS: Subjects with PFPS generated 24% less hip external rotator (P = .002) and 26% less hip abductor (P =. 006) torque. No between-group differences (P > .05) were found for average hip and knee transverse and frontal plane angles during stair descent. CONCLUSION: Subjects with PFPS had significant hip weakness but did not demonstrate altered hip and knee kinematics as previously theorized. Additional investigations are needed to better understand the association between hip weakness and PFPS etiology. SN - 0190-6011 UR - https://www.unboundmedicine.com/medline/citation/18349475/Hip_strength_and_hip_and_knee_kinematics_during_stair_descent_in_females_with_and_without_patellofemoral_pain_syndrome_ L2 - http://www.jospt.org/doi/full/10.2519/jospt.2008.2462?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -