Abstract
[Purpose] This study was performed to examine the correlation between lumbar pain and abdominal muscle thickness. [Subjects] The subjects were 64 males. [Methods] The subjects were divided into 3 groups based on the results of an interview about lumbar pain. Images of the transversus abdominis, internal abdominal oblique muscle, and external abdominal oblique muscle at rest were obtained using ultrasonography. [Results] The thickness of the transversus abdominis in the group of subjects who had visited a hospital for lumbar pain was less than other groups. [Conclusion] It was suggested that the experience of lumbar pain was related to a decrease in the thickness of the transversus abdominis at rest due to reduced muscular activity and an increase in the thickness of the internal and external abdominal oblique muscles at rest due to excessive muscular activity.
