Highlights
- •Hip transverse plane muscle imbalance is absent in femoroacetabular impingement.
- •Hip torque ratios can discriminate a severe femoroacetabular impingement state.
- •Greater abductor relative to adductor torque in severe femoroacetabular impingement.
Abstract
Background
Hip torque ratios are considered a useful measure for patients with hip pain. However,
evidence regarding this measure for patients with femoroacetabular impingement syndrome
is scarce. The primary aim of this study was to compare hip external-internal rotation
and abduction-adduction torque ratios between patients with femoroacetabular impingement
syndrome and asymptomatic individuals. The secondary aim was to compare hip torque
ratios between the asymptomatic group and femoroacetabular impingement syndrome patients
grouped according to the severity of symptoms and functional limitations.
Methods
Hip abduction-adduction and external-internal rotation torque ratios of 134 individuals
with femoroacetabular impingement syndrome and 134 asymptomatic matched controls was
assessed through isokinetic testing. Severity of symptoms and functional limitations
was assessed through the iHOT-33. Mann Whitney U and Kruskall-Wallis tests were used
to compare hip torque ratios between asymptomatic individuals and patients with femoroacetabular
impingement syndrome and to patients with femoroacetabular impingement syndrome with
different severities of symptoms and functional limitations.
Findings
No differences were identified in hip abduction-adduction (U = 7659.5, p = 0.192) and external-internal rotation (U = 8787.5, p = 0.764) torque ratios between patients with femoroacetabular impingement syndrome
and asymptomatic individuals. Hip abduction-adduction torque ratio was higher (p = 0.0127) in patients with a severe state (median = 1.80, IQR = 0.61) when compared
to asymptomatic individuals (median = 1.52, IQR = 0.45) (moderate effect size, r = 0.45).
Interpretation
Patients with severe symptoms and functional limitations related to FAI syndrome presented
greater hip abduction-adduction torque ratio than asymptomatic individuals, suggesting
a decreased adduction torque capacity relative to abduction torque in this subgroup
of femoroacetabular impingement.
Keywords
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Article info
Publication history
Published online: October 26, 2022
Accepted:
October 21,
2022
Received:
June 2,
2022
Identification
Copyright
© 2022 Elsevier Ltd. All rights reserved.
