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Isometric strength ratios of the hip musculature in females with patellofemoral pain: a comparison to pain-free controls.
J Strength Cond Res. 2013 Aug; 27(8):2165-70.JS

Abstract

The purpose of the study was to compare hip agonist-antagonist isometric strength ratios between females with patellofemoral pain (PFP) syndrome and pain-free control group. One hundred and twenty females between 15 and 40 years of age (control group: n = 60; PFP group: n = 60) participated in the study. Hip adductor, abductor, medial rotator, lateral rotator, flexor, and extensor isometric strength were measured using a hand-held dynamometer. Comparisons in the hip adductor/abductor and medial/lateral rotator and flexor/extensor strength ratios were made between groups using independent t-tests. Group comparisons also were made between the anteromedial hip complex (adductor, medial rotator, and flexor musculature) and posterolateral hip complex (abductor, lateral rotator, and extensor musculature). On average, the hip adductor/abductor isometric strength ratio in the PFP group was 23% higher when compared with the control group (p = 0.01). The anteromedial/posterolateral complex ratio also was significantly higher in the PFP group (average 8%; p = 0.04). No significant group differences were found for the medial/lateral rotator ratio and flexor/extensor strength ratios. The results of this study demonstrate that females with PFP have altered hip strength ratios when compared with asymptomatic controls. These strength imbalances may explain the tendency of females with PFP to demonstrate kinematic tendencies that increase loading on the patellofemoral joint (i.e., dynamic knee valgus).

Authors+Show Affiliations

Sports Traumatology Specialized Group, Federal University of São Paulo, São Paulo-SP, Brazil.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

23207884

Citation

Magalhães, Eduardo, et al. "Isometric Strength Ratios of the Hip Musculature in Females With Patellofemoral Pain: a Comparison to Pain-free Controls." Journal of Strength and Conditioning Research, vol. 27, no. 8, 2013, pp. 2165-70.
Magalhães E, Silva AP, Sacramento SN, et al. Isometric strength ratios of the hip musculature in females with patellofemoral pain: a comparison to pain-free controls. J Strength Cond Res. 2013;27(8):2165-70.
Magalhães, E., Silva, A. P., Sacramento, S. N., Martin, R. L., & Fukuda, T. Y. (2013). Isometric strength ratios of the hip musculature in females with patellofemoral pain: a comparison to pain-free controls. Journal of Strength and Conditioning Research, 27(8), 2165-70. https://doi.org/10.1519/JSC.0b013e318279793d
Magalhães E, et al. Isometric Strength Ratios of the Hip Musculature in Females With Patellofemoral Pain: a Comparison to Pain-free Controls. J Strength Cond Res. 2013;27(8):2165-70. PubMed PMID: 23207884.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Isometric strength ratios of the hip musculature in females with patellofemoral pain: a comparison to pain-free controls. AU - Magalhães,Eduardo, AU - Silva,Ana Paula M C C, AU - Sacramento,Sylvio N, AU - Martin,RobRoy L, AU - Fukuda,Thiago Y, PY - 2012/12/5/entrez PY - 2012/12/5/pubmed PY - 2014/4/17/medline SP - 2165 EP - 70 JF - Journal of strength and conditioning research JO - J Strength Cond Res VL - 27 IS - 8 N2 - The purpose of the study was to compare hip agonist-antagonist isometric strength ratios between females with patellofemoral pain (PFP) syndrome and pain-free control group. One hundred and twenty females between 15 and 40 years of age (control group: n = 60; PFP group: n = 60) participated in the study. Hip adductor, abductor, medial rotator, lateral rotator, flexor, and extensor isometric strength were measured using a hand-held dynamometer. Comparisons in the hip adductor/abductor and medial/lateral rotator and flexor/extensor strength ratios were made between groups using independent t-tests. Group comparisons also were made between the anteromedial hip complex (adductor, medial rotator, and flexor musculature) and posterolateral hip complex (abductor, lateral rotator, and extensor musculature). On average, the hip adductor/abductor isometric strength ratio in the PFP group was 23% higher when compared with the control group (p = 0.01). The anteromedial/posterolateral complex ratio also was significantly higher in the PFP group (average 8%; p = 0.04). No significant group differences were found for the medial/lateral rotator ratio and flexor/extensor strength ratios. The results of this study demonstrate that females with PFP have altered hip strength ratios when compared with asymptomatic controls. These strength imbalances may explain the tendency of females with PFP to demonstrate kinematic tendencies that increase loading on the patellofemoral joint (i.e., dynamic knee valgus). SN - 1533-4287 UR - https://www.unboundmedicine.com/medline/citation/23207884/Isometric_strength_ratios_of_the_hip_musculature_in_females_with_patellofemoral_pain:_a_comparison_to_pain_free_controls_ L2 - http://dx.doi.org/10.1519/JSC.0b013e318279793d DB - PRIME DP - Unbound Medicine ER -