Research Report Abstracts - Gesundheit

eS1024
Methods: The stair case consisted of four steps (rise height
18 cm, tread length 28.5 cm). Kinematic and kinetic data of
the lower limb was collected using a ten camera Vicon motion
analysis system (Oxford Metrics LTD, UK) and two Bertec
Force Platforms (Model MIE Ltd, Leeds, UK). Nicholas
Manual Muscle Tester (Model 01160, Lafayette, USA) was
used to evaluate isometric muscle strength from knee flexors
and extensors, hip abductors and hip flexors and extensors.
Hip pain was assessed using a visual analogue scale during
gait and stairclimbing.
Analysis: Hierarchical linear regression was used to determine
biomechanical predictors. Independent variables: Hip
pain during gait, stair ascent and descent, isometric hip
flexion, hip extension, hip abduction, knee flexion, knee
extension torque, WOMAC pain, stiffness, and function.
Dependent variables: Temporal, kinematic and kinetic data
during gait, stair ascent and descent. Significant changes in
R 2 were analysed with an F test. An alpha level of 0.05 was
used to determine significance.
Results: During gait, hip flexion isometric torque was a significant
predictor (p < 0.05) for increased stride time and hip
abduction isometric torque, a significant predictor (p < 0.05)
for increased hip flexion angle at toe off, accounting for
45% and 68% of the variance respectively. During stair
ascent, hip abduction isometric torque was a significant
predictor (range: p < 0.05–0.01) for increased stride time,
increased stance phase and reduced vertical ground reaction
force, accounting for 67%, 49% and 54% of the variance,
respectively. WOMAC stiffness was a significant predictor
(p < 0.05) for increased minimum hip angle during single
support accounting for 41% of the variance. During stair
descent, hip flexion isometric torque was a significant predictor
(range