Changes in Anticipatory Motor Strategies of People Affected of Low Back Pain

Our aim is to compare the motor strategies adopted by people with low back pain, but not in acute condition, with those presented by healthy people in different perturbed balance tasks. Movement strategies were extrapolated by measuring postural muscle adjustments over time as the co-activations of reciprocal agonist-antagonist postural muscle pairs. Subjects with low back pain, even in the absence of pain, presented higher muscle co-activations for all different balance tasks than healthy subjects. The efficient ankle strategy was predominantly applied by healthy subjects, whereas it was almost absent in subjects with low back pain.