Article

Individuals with knee osteoarthritis (OA) show variability during the
sit-to-stand (STS) task, so they may not perform the STS in the same way. This
study aimed to determine whether individuals with knee OA have different
strategies in performing the STS. METHODS:
Participants with knee OA and
able-bodied individuals underwent STS evaluation at a self-selected pace with use
of a motion measurement system consisting of 12 cameras and 2 force plates.
RESULTS: In total, 101 participants (57 women) with knee OA showed 3 main STS
strategies. As compared with the 27 controls (14 women), 24 OA participants,
compensated STS, showed greater trunk flexion (47.1 degrees vs. 38.3 degrees ;
P<0.01) and trunk obliquity (4.6 degrees vs. -0.8 degrees ; P<0.001) when
completing the STS task in the same amount of time as controls (2.4 vs. 2.7s;
P=0.999). The second group (n=59), inadequately compensated STS, also compensated
with trunk flexion (47.7 degrees vs. 38.3 degrees ; P<0.01) and trunk obliquity
(1.6 degrees vs. -0.8 degrees ; P<0.001) but took longer than controls (3.4 vs.
2.7s; P=0.001). The third group (n=18), severe impaired STS, took an extended
amount of time to execute the STS (6s), with marked trunk flexion (59.2 degrees )
and obliquity (4.1 degrees ), so participants in this group were perhaps severely
impaired in completing the STS. CONCLUSION: This study identified 3 groups STS
trunk strategies among participants with STS. Moreover, the data reveal a concise
representation of the relations among strategy variables. The findings could be
used to simplify the characterization of the STS among patients with knee OA and
aid with follow-up.
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Langue : ANGLAIS