SECTION II - EXERCISE PHYSIOLOGY AND SPORTS MEDICINE / RESEARCH PAPER
The Association between Pelvic Asymmetry and Lateral Abdominal Muscle Activity in a Healthy Population
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1
Institute of Physiotherapy and Health Sciences, Jerzy Kukuczka Academy of Physical Education in Katowice, Katowice, Poland.
 
2
Functional Diagnostics Laboratory, Sport-Klinika, Scanmed Sport, Żory, Poland.
 
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Laboratory of Pain Research, Institute of Physiotherapy and Health Sciences, Jerzy Kukuczka Academy of Physical Education in Katowice, Katowice, Poland.
 
4
Piast Gliwice Football Club, Gliwice, Poland.
 
5
Motion Analysis Laboratory, Institute of Physiotherapy and Health Sciences, Jerzy Kukuczka Academy of Physical Education in Katowice, Katowice, Poland.
 
 
Submission date: 2024-01-06
 
 
Final revision date: 2024-05-14
 
 
Acceptance date: 2024-07-11
 
 
Online publication date: 2024-12-19
 
 
Corresponding author
Maciej Biały   

Institute of Physiotherapy and Health Sciences, The Jerzy Kukuczka Academy of Physical Education, Katowice, Poland
 
 
 
KEYWORDS
TOPICS
ABSTRACT
The human pelvis is subjected to forces generated by abdominal muscles. Pelvic asymmetry (PA) might therefore be related to the asymmetrical postural activity of the lateral abdominal muscles (LAMs: transversus abdominis (TrA); internal oblique (IO); external oblique (EO)). The main aim of this study was to evaluate the potential relationship between PA, expressed by the asymmetry index in the frontal (PAIf) and sagittal (PAIs) planes and LAM postural activity as described by the tissue deformation index (TDI). A group of 126 healthy volunteers (59 females) was involved. Positions of the anatomic landmarks for PA measurement were registered by the motion capture system. The response of LAMs to postural disturbation was recorded using the M-mode ultrasounds. We found weak negative correlations between PAIf and TDI values as well for the right and the left side of the body except for EO muscle (PAIf-TRA right: r = −0.11, left: r = −0.06; PAIf-IO right: r = −0.15, left: r = −0.10; PAIf-EO right: r = 0.02, left: r = 0.12). On the contrary, analysis between PAIs and TDI values revealed weak positive correlations, also except for EO muscle (PAIf-TRA right: r = 0.004, left: r = 0.003; PAIf-IO right: r = 0.05, left: r = 0.06; PAIf-EO right: r = 0.07, left: r = −0.02). For all tested correlations, we recorded non-significant outcomes (all p > 0.05). We found no evidence to support the claim that PA is related to the LAM activity in the group of young, healthy, and active people.
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