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Analysis of hip strength in females seeking physical therapy treatment for unilateral patellofemoral pain syndrome.
J Orthop Sports Phys Ther. 2007 May; 37(5):232-8.JO

Abstract

STUDY DESIGN

Cross-sectional.

OBJECTIVES

To investigate whether females seeking physical therapy treatment for unilateral patellofemoral pain syndrome (PFPS) exhibit deficiencies in hip strength compared to a control group.

BACKGROUND

Decreased hip strength may be associated with poor control of lower extremity motion during weight-bearing activities, leading to abnormal patellofemoral motions and pain. Previous studies exploring the presence of hip strength impairments in subjects with PFPS have reported conflicting results.

METHODS AND MEASURES

Twenty females, aged 12 to 35 years, participated in the study. Ten subjects with unilateral PFPS were compared to 10 control subjects with no known knee pathologies. Hip abduction, extension, and external rotation strength were tested using a handheld dynamometer. A limb symmetry index (LSI) was used to quantify physical performance for all tests.

RESULTS

The symptomatic limbs of subjects with PFPS exhibited impairments in hip strength for all variables tested. LSI values in subjects with PFPS (range, 71%-79%) were significantly lower than those in control subjects (range, 93%-101%) (P< or =.007). A secondary analysis of data normalized to body mass demonstrated that the symptomatic limbs of subjects with PFPS had 52% less hip extension strength (P<.001), 27% less hip abduction strength (P = .007), and 30% less hip external rotation strength (P= .004) when compared to the weaker limbs of control subjects.

CONCLUSION

Females aged 12 to 35 presenting with unilateral PFPS demonstrate significant impairments in hip strength compared to control subjects when LSI values or body mass normalized values are used to quantify physical performance of the symptomatic limb.

Authors+Show Affiliations

Clinical Director, Denver Physical Therapy, Aurora, CO, USA. ryrob99@hotmail.comNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

17549951

Citation

Robinson, Ryan L., and Robert J. Nee. "Analysis of Hip Strength in Females Seeking Physical Therapy Treatment for Unilateral Patellofemoral Pain Syndrome." The Journal of Orthopaedic and Sports Physical Therapy, vol. 37, no. 5, 2007, pp. 232-8.
Robinson RL, Nee RJ. Analysis of hip strength in females seeking physical therapy treatment for unilateral patellofemoral pain syndrome. J Orthop Sports Phys Ther. 2007;37(5):232-8.
Robinson, R. L., & Nee, R. J. (2007). Analysis of hip strength in females seeking physical therapy treatment for unilateral patellofemoral pain syndrome. The Journal of Orthopaedic and Sports Physical Therapy, 37(5), 232-8.
Robinson RL, Nee RJ. Analysis of Hip Strength in Females Seeking Physical Therapy Treatment for Unilateral Patellofemoral Pain Syndrome. J Orthop Sports Phys Ther. 2007;37(5):232-8. PubMed PMID: 17549951.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Analysis of hip strength in females seeking physical therapy treatment for unilateral patellofemoral pain syndrome. AU - Robinson,Ryan L, AU - Nee,Robert J, PY - 2007/6/7/pubmed PY - 2007/7/20/medline PY - 2007/6/7/entrez SP - 232 EP - 8 JF - The Journal of orthopaedic and sports physical therapy JO - J Orthop Sports Phys Ther VL - 37 IS - 5 N2 - STUDY DESIGN: Cross-sectional. OBJECTIVES: To investigate whether females seeking physical therapy treatment for unilateral patellofemoral pain syndrome (PFPS) exhibit deficiencies in hip strength compared to a control group. BACKGROUND: Decreased hip strength may be associated with poor control of lower extremity motion during weight-bearing activities, leading to abnormal patellofemoral motions and pain. Previous studies exploring the presence of hip strength impairments in subjects with PFPS have reported conflicting results. METHODS AND MEASURES: Twenty females, aged 12 to 35 years, participated in the study. Ten subjects with unilateral PFPS were compared to 10 control subjects with no known knee pathologies. Hip abduction, extension, and external rotation strength were tested using a handheld dynamometer. A limb symmetry index (LSI) was used to quantify physical performance for all tests. RESULTS: The symptomatic limbs of subjects with PFPS exhibited impairments in hip strength for all variables tested. LSI values in subjects with PFPS (range, 71%-79%) were significantly lower than those in control subjects (range, 93%-101%) (P< or =.007). A secondary analysis of data normalized to body mass demonstrated that the symptomatic limbs of subjects with PFPS had 52% less hip extension strength (P<.001), 27% less hip abduction strength (P = .007), and 30% less hip external rotation strength (P= .004) when compared to the weaker limbs of control subjects. CONCLUSION: Females aged 12 to 35 presenting with unilateral PFPS demonstrate significant impairments in hip strength compared to control subjects when LSI values or body mass normalized values are used to quantify physical performance of the symptomatic limb. SN - 0190-6011 UR - https://www.unboundmedicine.com/medline/citation/17549951/Analysis_of_hip_strength_in_females_seeking_physical_therapy_treatment_for_unilateral_patellofemoral_pain_syndrome_ L2 - http://www.jospt.org/doi/full/10.2519/jospt.2007.2439?url_ver=Z39.88-2003&amp;rfr_id=ori:rid:crossref.org&amp;rfr_dat=cr_pub=pubmed DB - PRIME DP - Unbound Medicine ER -