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Objectives:

Chronic low back pain (CLBP) is associated with an impaired control of transversus abdominis/internal oblique muscle (TrA/IO), volitionally and during anticipatory postural adjustment (delay) along with maladaptive reorganization of primary motor cortex (M1). Specific training of deep trunk muscles and repetitive peripheral magnetic stimulation (RPMS) improve motor control. We thus tested whether RPMS over TrA/IO combined with training could promote TrA/IO motor control and decrease pain beyond the gains already reached in CLBP.

Methods:

Thirteen CLBP patients, randomly allocated to RPMS and sham groups and compared with 9 pain-free controls, were tested in 1 session before/after (stimulation alone) and after (stimulation+ TrA/IO training) combination. TrA/IO motor patterns were recorded during ballistic shoulder flexion using surface electromyography. Transcranial magnetic stimulation …