[The morphometric indices and echo structure of the muscles of the human abdominal wall under the action of physical loading].

An ultrasonic examination of muscles was carried out with the help of echo chamber "Aloka-280" and "Aloka-630" (Japan), transducers of 3.5 and 5 MHz. Under examination there were 15 sportsmen and a group of people not going in for sports, aged from 17 to 21 years. Morphometry of the white line, wide abdominal muscles on seven levels and of musculus rectus abdominis on five levels was performed. It was found that systematic physical exercises resulted in hypertrophy of muscles of the abdominal wall and enlargement of the white line width. The arrangement of wide muscles of the abdomen corresponding to the lateral margin of musculus rectus abdominis is symmetrical on the right and left in each group. At all the levels of scanning the internal oblique muscle of the abdomen was localized medial to the musculus rectus margin. In sportsmen such an arrangement relative to one another is better pronounced than in a control group from the 2nd to 5th levels. An analysis of histograms has shown that abdominal musculus rectus of sportsmen possesses less echogeneity and is more echo-homogeneous than the muscles of people not going in for sports. Thus, constant physical exercises cause not only enlargement of sizes of the abdominal wall muscles, but also leads to changes in topographic-anatomic interrelations of its structures.