Fig. 1From: Asymmetrical and smaller size of trunk muscles in combat sports athletes with lumbar intervertebral disc degenerationTransverse (a) and traced (b) images of the trunk muscles at the L3–4 disc level. In the present study, the cross-sectional areas (CSAs) on each side of midline are grouped in 5 large areas (1 rectus abdominis, 2 obliques, 3 psoas, 4 quadratus lumborum, 5 lumbar erector spinae plus multifidus)Back to article page