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The importance of body mass normalisation for ultrasound measurements of the morphology of oblique abdominis muscles: the effect of age, gender, and sport practice
Affiliations- Department of Kinesitherapy and Special Methods in Physiotherapy, The Jerzy Kukuczka Academy of Physical Education, Katowice, Poland
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Abstract
Some studies have not considered body mass as a confounder in analysis of oblique abdominis muscles (OAM) (including the oblique externus [OE] and oblique internus [OI]), which may have led to improper interpretation of results. To assess the differences in the effect of age, gender, and physical activity between normalised for body mass and actual values of the OAM as well as to establish the effect of age, gender, and physical activity on normalised for body mass OAM thicknesses in adolescents. A real-time ultrasound was used to obtain images of the OAM. Body mass normalisation for OAM thicknesses was performed with allometric scaling and the following equations: Allometric-scaled OE = OE thickness/body mass0.88; Allometric-scaled OI = OI thickness/body mass0.72. Analysis showed that boys have significantly thicker OAM than girls, and those who practise sports have thicker OAM than non-active individuals. For allometric-scaled OAM, there was only a significant gender effect, where boys have thicker allometric-scaled OAM than girls. There was a significant correlation between participants’ age and the actual value of the OAM. The correlations between age and allometric-scaled OAM were insignificant. An analysis of OAM without body mass normalisation can lead to improper interpretation of study results. Thus, future studies should analyse OE and OI thickness measurements after normalisation rather than actual values. In the adolescent population, there is no effect of age and physical activity on allometric-scaled OAM; males have thicker allometric-scaled OAM than females. (Folia Morphol 2018; 77, 1: 123–130)
Abstract
Some studies have not considered body mass as a confounder in analysis of oblique abdominis muscles (OAM) (including the oblique externus [OE] and oblique internus [OI]), which may have led to improper interpretation of results. To assess the differences in the effect of age, gender, and physical activity between normalised for body mass and actual values of the OAM as well as to establish the effect of age, gender, and physical activity on normalised for body mass OAM thicknesses in adolescents. A real-time ultrasound was used to obtain images of the OAM. Body mass normalisation for OAM thicknesses was performed with allometric scaling and the following equations: Allometric-scaled OE = OE thickness/body mass0.88; Allometric-scaled OI = OI thickness/body mass0.72. Analysis showed that boys have significantly thicker OAM than girls, and those who practise sports have thicker OAM than non-active individuals. For allometric-scaled OAM, there was only a significant gender effect, where boys have thicker allometric-scaled OAM than girls. There was a significant correlation between participants’ age and the actual value of the OAM. The correlations between age and allometric-scaled OAM were insignificant. An analysis of OAM without body mass normalisation can lead to improper interpretation of study results. Thus, future studies should analyse OE and OI thickness measurements after normalisation rather than actual values. In the adolescent population, there is no effect of age and physical activity on allometric-scaled OAM; males have thicker allometric-scaled OAM than females. (Folia Morphol 2018; 77, 1: 123–130)
Keywords
body mass, normalisation, allometric scaling, oblique internus, oblique externus, abdominal wall morphology
About this articleTitle
The importance of body mass normalisation for ultrasound measurements of the morphology of oblique abdominis muscles: the effect of age, gender, and sport practice
Journal
Issue
Article type
Original article
Pages
123-130
Published online
2017-06-20
Page views
1751
Article views/downloads
1381
DOI
Pubmed
Bibliographic record
Folia Morphol 2018;77(1):123-130.
Keywords
body mass
normalisation
allometric scaling
oblique internus
oblique externus
abdominal wall morphology
Authors
P. Linek
References (28)- Cumming G. Understanding the New Statistics: Effect Sizes, Confidence Intervals, and Meta-Analysis. Routledge, New York: NY 2012.
- DiMeglio A, Dimeglio A, Canavese F, et al. Growth and adolescent idiopathic scoliosis: when and how much? J Pediatr Orthop. 2011; 31(1 Suppl): S28–S36.
- Ehsani F, Arab AM, Jaberzadeh S, et al. Ultrasound measurement of deep and superficial abdominal muscles thickness during standing postural tasks in participants with and without chronic low back pain. Man Ther. 2016; 23: 98–105.
- Fong DY, Lee CF, Cheung KM, et al. A meta-analysis of the clinical effectiveness of school scoliosis screening. Spine (Phila Pa 1976). 2010; 35(10): 1061–1071.
- Gray J, Aginsky KD, Derman W, et al. Symmetry, not asymmetry, of abdominal muscle morphology is associated with low back pain in cricket fast bowlers. J Sci Med Sport. 2016; 19(3): 222–226.
- Hides J, Wilson S, Stanton W, et al. An MRI investigation into the function of the transversus abdominis muscle during "drawing-in" of the abdominal wall. Spine (Phila Pa 1976). 2006; 31(6): E175–E178.
- Ikezoe T, Mori N, Nakamura M, et al. Effects of age and inactivity due to prolonged bed rest on atrophy of trunk muscles. Eur J Appl Physiol. 2012; 112(1): 43–48.
- Jaric S, Mirkov D, Markovic G. Normalizing physical performance tests for body size: a proposal for standardization. J Strength Cond Res. 2005; 19(2): 467–474.
- Linek P. Assessment of the deep abdominal muscles at rest and during the abdominal drawing-in maneuver in adolescents practicing volleyball: A case control study. Isokinet Exerc Sci. 2015; 23(4): 215–220.
- Linek P. The importance of body mass normalisation for ultrasound measurement of the transversus abdominis muscle: The effect of age, gender and sport practice. Musculoskelet Sci Pract. 2017; 28: 65–70.
- Linek P, Saulicz E, Kuszewski M, et al. Ultrasound Assessment of the Abdominal Muscles at Rest and During the ASLR Test Among Adolescents With Scoliosis. Clin Spine Surg. 2017; 30(4): 181–186.
- Linek P, Saulicz E, Wolny T, et al. Reliability of B-mode sonography of the abdominal muscles in healthy adolescents in different body positions. J Ultrasound Med. 2014; 33(6): 1049–1056.
- Linek P, Saulicz E, Wolny T, et al. Assessment of the abdominal muscles at rest and during abdominal drawing-in manoeuvre in adolescent physically active girls: A case–control study. J Sport Heal Sci. 2017; 6(1): 118–124.
- Linek P, Saulicz E, Wolny T, et al. Body mass normalization for ultrasound measurements of adolescent lateral abdominal muscle thickness. J Ultrasound Med. 2017; 36(4): 775–782.
- Linek P, Saulicz E, Wolny T, et al. Intra-rater reliability of B-mode ultrasound imaging of the abdominal muscles in healthy adolescents during the active straight leg raise test. PM R. 2015; 7(1): 53–59.
- Linek P, Saulicz E, Wolny T, et al. Ultrasound evaluation of the symmetry of abdominal muscles in mild adolescent idiopathic scoliosis. J Phys Ther Sci. 2015; 27(2): 465–468.
- Linek P, Saulicz E, Wolny T, et al. Lateral abdominal muscle size at rest and during abdominal drawing-in manoeuvre in healthy adolescents. Man Ther. 2015; 20(1): 117–123.
- Mannion AF, Pulkovski N, Toma V, et al. Abdominal muscle size and symmetry at rest and during abdominal hollowing exercises in healthy control subjects. J Anat. 2008; 213(2): 173–182.
- Manshadi FD, Parnianpour M, Sarrafzadeh J, et al. Abdominal hollowing and lateral abdominal wall muscles' activity in both healthy men & women: An ultrasonic assessment in supine and standing positions. J Bodyw Mov Ther. 2011; 15(1): 108–113.
- McGraw K, Wong SP. A common language effect size statistic. Psychological Bulletin. 1992; 111(2): 361–365.
- Nuzzo JL, Mayer JM. Body mass normalisation for ultrasound measurements of lumbar multifidus and abdominal muscle size. Man Ther. 2013; 18(3): 237–242.
- Rankin G, Stokes M, Newham DJ. Abdominal muscle size and symmetry in normal subjects. Muscle Nerve. 2006; 34(3): 320–326.
- Rho M, Spitznagle T, Van Dillen L, et al. Gender differences on ultrasound imaging of lateral abdominal muscle thickness in asymptomatic adults: a pilot study. PM R. 2013; 5(5): 374–380.
- Rostami M, Ansari M, Noormohammadpour P, et al. Ultrasound assessment of trunk muscles and back flexibility, strength and endurance in off-road cyclists with and without low back pain. J Back Musculoskelet Rehabil. 2015; 28(4): 635–644.
- Rostami M, Noormohammadpour P, Mansournia MA, et al. Comparison of the thickness of lateral abdominal muscles between pregnant women with and without low back pain. PM R. 2015; 7(5): 474–478.
- Sitilertpisan P, Pirunsan U, Puangmali A, et al. Comparison of lateral abdominal muscle thickness between weightlifters and matched controls. Phys Ther Sport. 2011; 12(4): 171–174.
- Springer BA, Mielcarek BJ, Nesfield TK, et al. Relationships among lateral abdominal muscles, gender, body mass index, and hand dominance. J Orthop Sports Phys Ther. 2006; 36(5): 289–297.
- Wilson A, Hides JA, Blizzard L, et al. Measuring ultrasound images of abdominal and lumbar multifidus muscles in older adults: A reliability study. Man Ther. 2016; 23: 114–119.
