title: Lateral abdominal muscle size at rest and during abdominal drawing-in manoeuvre in healthy adolescents.
abstract: Lateral abdominal wall muscles in children and adolescents have not been characterised to date. In the present report, we examined the reliability of the ultrasound measurement and thickness of the oblique external muscle (OE), oblique internal muscle (OI) and transverse abdominal muscle (TrA) at rest and during abdominal drawing-in manoeuvre (ADIM) on both sides of the body in healthy adolescents. We also determined possible differences between boys and girls and defined any factors-such as body mass, height and BMI-that may affect the thickness of the abdominal muscles. B-mode ultrasound was used to assess OE, OI and TrA on both sides of the body in the supine position. Ultrasound measurements at rest and during ADIM were reliable in this age group (ICC3,3 > 0.92). OI was always the thickest and TrA the thinnest muscle on both sides of the body. In this group, an identical pattern of the contribution of the individual muscles to the structure of the lateral abdominal wall (OI > OE > TrA) was observed. At rest and during ADIM, no statistically significant side-to-side differences were demonstrated in either gender. The body mass constitutes between 30% and <50% of the thickness differences in all muscles under examination at rest and during ADIM. The structure of lateral abdominal wall in adolescents is similar to that of adults. During ADIM, the abdominal muscles in adolescents react similarly to those in adults. This study provided extensive information regarding the structure of the lateral abdominal wall in healthy adolescents.
authors.affiliation: Department of Kinesitherapy and Special Methods in Physiotherapy, The Jerzy Kukuczka Academy of Physical Education, Mikolowska 72B, 40-065 Katowice, Poland. Electronic address: linek.fizjoterapia@vp.pl.
authors.forename: Pawel
authors.initials: P
authors.lastname: Linek
authors.affiliation: Department of Kinesitherapy and Special Methods in Physiotherapy, The Jerzy Kukuczka Academy of Physical Education, Mikolowska 72B, 40-065 Katowice, Poland.
authors.forename: Edward
authors.initials: E
authors.lastname: Saulicz
authors.affiliation: Department of Kinesitherapy and Special Methods in Physiotherapy, The Jerzy Kukuczka Academy of Physical Education, Mikolowska 72B, 40-065 Katowice, Poland.
authors.forename: Tomasz
authors.initials: T
authors.lastname: Wolny
authors.affiliation: Department of Kinesitherapy and Special Methods in Physiotherapy, The Jerzy Kukuczka Academy of Physical Education, Mikolowska 72B, 40-065 Katowice, Poland.
authors.forename: Andrzej
authors.initials: A
authors.lastname: Myśliwiec
authors.affiliation: Department of Kinesitherapy and Special Methods in Physiotherapy, The Jerzy Kukuczka Academy of Physical Education, Mikolowska 72B, 40-065 Katowice, Poland.
authors.forename: Mirosław
authors.initials: M
authors.lastname: Kokosz
mesh_terms: D000009:Abdominal Muscles / Q000033:anatomy & histology* / Q000000981:diagnostic imaging* / Q000502:physiology*; D000293:Adolescent; D002648:Child; D005260:Female; D064368:Healthy Volunteers; D006801:Humans; D008297:Male; D009119:Muscle Contraction / Q000502:physiology; D015203:Reproducibility of Results; D012146:Rest
keywords: Abdominal wall; Adolescents; Muscle size; Ultrasound