POSTER ABSTRACTS - ISAKOS

purpose of this study was to develop a strength
test battery with high reliability and high ability to
detect difference in power development between
the injured and the uninjured side in patients with
ACL injury. The study is part of a larger
prospective project on patients with ACL injury
aiming for establishing criteria to return to sports,
for evaluating rehabilitation protocols and to aid
in the decision making process on surgery or not.
Methods: Thirteen healthy subjects performed
three strength tests for maximal power on each
leg in a test-retest design (n = 26). Thirty-four
patients with a uni-lateral ACL injury were tested
six months after ACL reconstruction. The three
strength tests were: leg extension, leg curl and leg
press. Results: ICC values ranged from 0.83-0.99
for the three strength tests, indicating that all
three tests had high reliability. When comparing
side-to-side difference in the healthy subjects
92%, 92% and 75% were considered to have
normal symmetry (10% side-toside
difference). Conclusion: It is concluded that
the test battery, with the three strength tests, has
a high ability to detect difference in power
development between the injured and the
uninjured side in patients six months after ACL
reconstruction. The test battery is therefore used
in ongoing studies on patients with ACL injury
and after ACL surgery.
E-poster #324
A Hop Test Battery for Evaluation of Side-to-
Side Difference in Hop Performance in Patients
with ACL Injury
Roland Thomee, Goteborg, SWEDEN, Presenter
Alexander Gustavsson, Goteborg, SWEDEN
Camille Neeter, Goteborg, SWEDEN
Pia Thomee, Goteborg, SWEDEN
Jon Karlsson, Goteborg, SWEDEN
Dept of Orthopaedics, Goteborg, SWEDEN
injury or after ACL surgery. The literature also
clearly states that insufficiently rehabilitated ACL
patients do worse in terms of: returning to preinjury
sports level, risk for further knee pathology
or re-injury. The purpose of this study was to
develop a test battery of hop tests with high
ability to discriminate hop performance between
the injured and the uninjured side in patients with
anterior cruciate ligament ACL injury and in
patients after ACL reconstruction. The study is
part of a larger prospective project on patients
with ACL injury aiming for establishing criteria to
return to sports, for evaluating rehabilitation
protocols and to aid in the decision making
process on surgery or not. Methods: Fifteen
healthy subjects performed five hop tests in a
test-retest design. Twenty-five patients with ACL
injury and 32 patients after ACL reconstruction
were tested. The five hop tests were: vertical jump,
hop for distance, drop jump followed by a double
hop for distance, square hop and side hop.
Results: ICC values ranged from 0.85 to 0.97 for
the five hop tests, indicating that all tests had
high reliability. When comparing side-to-side
difference in the healthy subjects 67% to 100%
were considered to have normal symmetry (10 % side-to-side difference).
Conclusion: It is concluded that the test battery,
with the three hop tests, is suitable to
discriminate hop performance between the
injured and the uninjured side in patients with
ACL injury and in patients after ACL
reconstruction. The test battery is therefore used
in ongoing studies on patients with ACL injury
and after ACL surgery.
The literature clearly states that muscle function,
e.g. maximal single-leg hop performance, is not
restored within the first year for a vast majority of
patients after anterior cruciate ligament (ACL)