Difference of the thickness and activation of trunk muscles during static stoop lift at different loads between subjects with and without low back pain.

Background: Patients suffering from low back pain (LBP) have been reported to alter muscle contraction strategies.

Objective: To compare activity and thickness of the trunk muscles (external oblique (EO), internal oblique (IO), transversus abdominis (TrA), and lumbar multifidus (LM)) during static stoop lift at different lifting loads between the subjects with and without LBP.

Methods: Twenty eight subjects with LBP and twenty eight healthy subjects were recruited.

Effect of evidence-based trunk stability exercises on the thickness of the trunk muscles.

[Purpose] This study was conducted to investigate the effect of four spine stability exercises on the thickness of the internal and external oblique abdominal muscles, the transverses abdominis, and the multifidus muscles. [Subjects and Methods] Forty healthy adults were enrolled and randomly allocated to four groups. Ten participants performed bridge exercises (BE) while lying on their back; 10 others performed the same exercises with their right legs up (BERL); another 10 performed the same exercises on their side (SBE); and the remaining 10 performed them in a quadruped position with left arm and right leg lifts (QLARL).