TY - JOUR
T1 - Impaired hip muscle strength in patients with femoroacetabular impingement syndrome
AU - Kierkegaard, Signe
AU - Mechlenburg, Inger
AU - Lund, Bent
AU - Søballe, Kjeld
AU - Dalgas, Ulrik
N1 - Copyright © 2017 Sports Medicine Australia. Published by Elsevier Ltd. All rights reserved.
PY - 2017/12
Y1 - 2017/12
N2 - Objectives Patients with femoroacetabular impingement (FAI) experience hip pain as well as decreased function and lowered quality of life. The aim was to compare maximal isometric and isokinetic muscle strength (MVC) during hip flexion and extension and rate of force development (RFD) during extension between patients with FAI and a matched reference group. Secondary, the aim was to compare patient hips and subgroups defined by gender and age as well as to investigate associations between hip muscle strength and self-reported outcomes. Design Cross-sectional, comparative study Methods Sixty patients (36 ± 9 years, 63% females) and 30 age and gender matched reference persons underwent MVC tests in an isokinetic dynamometer. Results During hip flexion and extension, patients’ affected hip showed a strength deficit of 15–21% (p < 0.001) and 10–25% (p < 0.03) compared with reference MVC, respectively. The affected hip of the patients was significantly weaker than their contralateral hip. RFD was significantly decreased for both patient hips compared to the reference group (p < 0.05). While age had less effect on MVC, female patients were more affected than male patients. Self-reported measures were associated with isometric hip muscle strength. Conclusions Patients with FAI demonstrate decreased hip flexion and extension strength when compared to (1) reference persons and (2) their contralateral hip. There seems to be a gender specific affection which should be investigated further and addressed when planning training protocols. Furthermore, self-reported measures were associated with isometric muscle strength, which underlines the clinical importance of the reduced muscle strength.
AB - Objectives Patients with femoroacetabular impingement (FAI) experience hip pain as well as decreased function and lowered quality of life. The aim was to compare maximal isometric and isokinetic muscle strength (MVC) during hip flexion and extension and rate of force development (RFD) during extension between patients with FAI and a matched reference group. Secondary, the aim was to compare patient hips and subgroups defined by gender and age as well as to investigate associations between hip muscle strength and self-reported outcomes. Design Cross-sectional, comparative study Methods Sixty patients (36 ± 9 years, 63% females) and 30 age and gender matched reference persons underwent MVC tests in an isokinetic dynamometer. Results During hip flexion and extension, patients’ affected hip showed a strength deficit of 15–21% (p < 0.001) and 10–25% (p < 0.03) compared with reference MVC, respectively. The affected hip of the patients was significantly weaker than their contralateral hip. RFD was significantly decreased for both patient hips compared to the reference group (p < 0.05). While age had less effect on MVC, female patients were more affected than male patients. Self-reported measures were associated with isometric hip muscle strength. Conclusions Patients with FAI demonstrate decreased hip flexion and extension strength when compared to (1) reference persons and (2) their contralateral hip. There seems to be a gender specific affection which should be investigated further and addressed when planning training protocols. Furthermore, self-reported measures were associated with isometric muscle strength, which underlines the clinical importance of the reduced muscle strength.
KW - Journal Article
UR - https://www.scopus.com/pages/publications/85020176383
U2 - 10.1016/j.jsams.2017.05.008
DO - 10.1016/j.jsams.2017.05.008
M3 - Journal article
C2 - 28595868
SN - 1440-2440
VL - 20
SP - 1062
EP - 1067
JO - Journal of Science and Medicine in Sport
JF - Journal of Science and Medicine in Sport
IS - 12
ER -