DOS 2016

DOS Kongressen 2016 ·

129

Quadriceps strength and hop test performance

following anterior cruciate ligament reconstruction: A

prospective cohort study of 123 patients.

Kristoffer Weisskirchner Barfod, Julian A Feller, Ross Clark, Taylor Hartwig, Brian

M Devitt, Kate E Webster

OrthoSport Victoria Research Unit, Deakin University and Epworth HealthCare,

Australia; OrthoSport Victoria Research Unit, Deakin University and Epworth

HealthCare, Australia; School of Health and Sports Science, University of the

Sunshine Coast, Australia; OrthoSport Victoria Research Unit, Deakin University

and Epworth HealthCare, Australia; OrthoSport Victoria Research Unit, Deakin

University and Epworth HealthCare, Australia; School of Allied Health, College of

Science, Health & Engineering, La Trobe University, Australia

Background:

Although quadriceps weakness is a common impairment follow-

ing anterior cruciate ligament reconstruction (ACLR), there is limited research

examining its association with functional outcomes.

Purpose / Aim of Study:

The purpose of the study was to determine the pro-

portion of patients with strength deficits at 6 and 12 months and the associa-

tion between strength outcomes and single limb hop tests.

Materials and Methods:

The study was performed as a prospective cohort

study following the STROBE guidelines. There were 123 patients (74 male, 49

female). Quadriceps strength and hop test measurements were made at 6- and

12-months following primary ACLR with hamstring grafts. Normal strength and

hopping distance were defined as >85% of the contralateral limb.

Findings / Results:

At 6- and 12-months 29% and 53% of patients had re-

covered normal quadriceps strength respectively. The majority of patients who

had recovered normal strength also had a normal hopping distance at 6 (91%)

and 12 (93%) months. However, at 6- and 12- months 39% and 29% of pa-

tients respectively had recovered normal hopping distance without recovering

normal quadriceps strength.

Conclusions:

Only 1 in 3 patients had recovered normal QF strength 6 month

after ACLR, at the time when they are often expecting to resume sporting ac-

tivity. This had only improved to 1 in 2 at 12 months. Approximately 1 in 3

patients recover normal hopping distance without having normal quadriceps

strength.

No conflicts of interest reported

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