Article

The aim of this study was to determine whether side-lying hip
abduction exercise while applying manual pelvic fixation is more effective than
hip abduction without manual pelvic fixation for promoting deep trunk muscle activity. DESIGN: This is a cross-sectional study comparing deep trunk muscle
activation between hip abduction exercise without and with manual pelvic fixation
in ten participants. Muscle activation was measured using fine-wire and surface
electromyography. RESULTS: Hip abduction with manual pelvic fixation was found to
result in significantly more recruitment of all studied deep trunk muscles except
the ipsilateral obliquus externus compared with hip abduction without manual
pelvic fixation (P < 0.05). The greatest increased activation was seen in the
ipsilateral deep and superficial multifidus. The increase in deep multifidus
percentage of maximal voluntary contraction was greater than that of the rectus
abdominis, the obliquus externus, the transversuus abdominis/obliquus internus,
the lumbar erector spinae, the superficial multifidus, and the gluteus medius (P
< 0.05). The superficial multifidus percentage of maximal voluntary contraction
was significantly increased over that of the rectus abdominis and the obliquus
externus (P < 0.05). Moderate correlation between deep and superficial multifidus
activation was found (Pearson correlation coefficient, 0.537). CONCLUSIONS: Hip abduction training in the side-lying position while applying manual pelvic
fixation seems to be more effective for recruiting deep trunk muscles for dynamic
lumbar spinal stabilization.

Langue : ANGLAIS