Article

We examine the postural profile and muscular forces of the trunk and
inferior members of patients with chronic low back pain. METHODS: In this study,
we include 60 subjects forming two groups: a first group (G1) of 30 patients with
chronic low back pain and a second group (G2) of 30 healthy subjects. Every
subject profited from an isokinetic evaluation of the muscular forces of the
trunk (at 60 and 90 degrees .s(-1)) and knees (at 60 and 120 degrees .s(-1)) and
of a postural evaluation. The isokinetic evaluation was carried out using
Cybex((R)) Norm II dynamometer with its Trunk Extension/Flexion (TEF) module set
in concentric mode. The parameter under study was the torque peak. The postural
evaluation was accomplished using the platform SATEL for the balance analysis
associated with four conditions: static on stable plan open eyes (OE) then closed
eyes (CE) and static on unstable plan OE then CE. The parameters under study were
the averages of the total lengths, total surfaces, and the X and Y means.
RESULTS: The averages of the torque peaks of the trunk flexor and extensor
muscles at the speeds of 60 and 90 degrees .s(-1) were inferior in group G1 as
compared to G2. The differences were statistically insignificant only for the
extensor muscles (p<0.005). The averages of the torque peaks of the knee flexors
and extensors at 60 and 120 degrees .s(-1) were the lowest in group G1. The
differences were significant (p<0.05). The averages of postural parameters were
more important in group G1, indicating a postural deficit in this group.
CONCLUSION: We showed deficits of the posture and muscles of the trunk and knees
of patients with chronic lumbar pain. The muscular deficit of the trunk predominates on extensors.
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Langue : ANGLAIS