The majority of consistent gait deviations associated with KOA were exhibited by those with severe disease in the temporospatial domain .
There was a lack of evidence for alterations in the external knee adduction moment .
Individuals with KOA exhibit a range of gait deviations compared with controls .
Despite its common usage in KOA gait studies , we did not find consistent evidence that knee adduction moment differs between those with and without KOA or between disease severity levels .
OBJECTIVE To identify which gait deviations are consistently associated with knee osteoarthritis ( KOA ) and how these are influenced by disease severity , the involved compartment , and sex .
Alterations in lower extremity movement and muscle activation patterns in individuals with knee osteoarthritis.
OBJECTIVE The purpose of this study was to investigate lower extremity movement and muscle activation patterns in individuals with knee osteoarthritis and healthy age- and gender-matched control subjects . DESIGN This study utilized a non-r and omized case-control design to compare 24 subjects with unilateral symptomatic knee osteoarthritis to 24 age- and gender-matched control subjects without knee osteoarthritis . BACKGROUND It is hypothesized that knee osteoarthritis is associated with altered lower extremity movement and muscle activation patterns . METHODS A gait analysis was performed to determine the lower extremity movement and muscle activation patterns when walking on a level surface at 1.12 to 1.34 m/s and while descending a 20 cm step . Paired t-tests were used to compare the average of five trials between the groups . RESULTS Subjects with knee osteoarthritis demonstrated less excursion of the knee in the sagittal plane from heelstrike to peak flexion before midstance ( i.e. during loading ) . Subjects with knee osteoarthritis also demonstrated reduced peak vertical ground reaction forces relative to body weight . The muscle activity patterns were also different between the groups . The vastus lateralis , medial hamstrings , tibialis anterior and medial gastrocnemius were on approximately 1.5 times longer than the same muscles in the control subjects . Additionally , significant increases in muscle co-activation were also observed in individuals with knee osteoarthritis during walking . Similar findings were observed when the subject descended a 20 cm step
The majority of consistent gait deviations associated with KOA were exhibited by those with severe disease in the temporospatial domain .
There was a lack of evidence for alterations in the external knee adduction moment .
Individuals with KOA exhibit a range of gait deviations compared with controls .
Despite its common usage in KOA gait studies , we did not find consistent evidence that knee adduction moment differs between those with and without KOA or between disease severity levels .
OBJECTIVE To identify which gait deviations are consistently associated with knee osteoarthritis ( KOA ) and how these are influenced by disease severity , the involved compartment , and sex .