The use of two-dimensional motion analysis and functional performance tests for assessment of knee injury risk behaviours in athletes

Munro, AG

Abstract

Abstract
Dynamic knee valgus and limb asymmetry have
been linked to greater risk
of anterior cruciate ligament (ACL) or patellofemoral joint (PFJ) injury. Two-dimensional (2D) frontal plane projection angle (FPPA)is more clinically useful than three-dimensional (3D) motion analysis techniques used to
assess dynamic knee valgus in the literature. Further, hop for distance tests and the star excursion balance test (SEBT)offer a clinically useful assessment
of limb symmetry.
1.
Reliability and validity of 2D FPPA
Within-day and between-session reliability of 2D
FPPA during the drop jump (DJ), single leg
land (SLL) and single leg squat (SLS) tasks was fair to good.Intra-and inter-tester reliability
was excellent.
Significant correlations were found between 2D FPPA and 3D
measures of
dynamic knee valgus
. These re
sults indicate that 2D FPPA is a
reliable and
valid measure of
dynamic knee valgus.
2.
Reliability of hop for distance tests and the SEBT
Between
-
session reliability of the hop for distance tests and SEBT was good.
Error
measurement
v
alues
were calculated to
evaluate future performance
.
3.
Investigation of factors contributing to 2D FPPA
Significant correlations were found between DJ FPPA and isometric hip abduction, external
rotation and combined abduction/external rotation (clam) strength. Clam strength
accounted
for 20% of the variance in 2D FPPA. No significant correlations were found for SLL FPPA.
4.
Use of feedback to modify movement patterns
Augmented feedback was shown to significantly improve landing patterns during the drop DJ
and SLL tasks. In the
DJ task a significant reduction in FPPA and increase in contact time
were found post
-
feedback. A significant reduction in FPPA and vertical ground reaction
forces were found for the SLL task.
5.
Prospective assessment of ACL injury risk in women’s sport
One
women’s footballer suffered an ACL injury and was found to demonstrate greater FPPA
during the DJ, SLL and SLS tasks and lower crossover hop for distance scores than her peers.
Limb asymmetry did not appear to predict ACL injury risk in this athlete.

Citation

Munro, A. The use of two-dimensional motion analysis and functional performance tests for assessment of knee injury risk behaviours in athletes. (Thesis). University of Salford

• Thesis Type: Thesis
• Deposit Date: Dec 12, 2013
• Publicly Available Date: Dec 12, 2013