2018 Volume 18 Pages 51-54
We studied the effects of change in position from the supine to the upright position on the distance between the two anterior superior iliac spines. Thirteen healthy men with an average age of 29.8 ± 8.7 years were the subjects. They were asked to maintain the supine and the upright positions, and a measuring tape was used to determine the distance between the anterior superior iliac spines, along the skin of the abdomen. The paired t-test was performed using the measurements of the supine and upright positions. A significant increase was found in the distance between the anterior superior iliac spines in the upright position compared with that in the supine position. This may be attributable to increased muscle thickness, reflecting activity of the transverse abdominal muscle and the internal oblique muscle transverse fibers, and also forward and downward bulging of the abdominal wall due to the weight of the intra-abdominal organs.
