Článek se zabývá hodnocením morfologie svalů břišní stěny s důrazem na posouzení stranové symetrie u elitních hráček florbalu v souvislosti s bolestí dolní části zad. Výzkumu se zúčastnilo 20 hráček extraligy žen ve florbalu, které vyplnily elektronický dotazník standardizovaně hodnotící bolesti dolní části zad. U hráček byly sonograficky měřeny lineární rozměry břišních svalů v klidové poloze oboustranně. Byla zjištěna signifikantní stranová asymetrie lineárních rozměrů břišních svalů (p = 0,02; Cohenovo d = 0,52). Souvislost této asymetrie s biomechanikou pohybu ve florbalu, korelující se stranou držení hole hráček, však nelze na základě shromážděných dat prokázat (p = 0,34–0,95; Cohenovo d = –0,15 až 0,38). Ve výsledcích dále pozorujeme určité trendy. Ve srovnání s dříve publikovaným ženským průměrem vidíme u účastnic hypertrofii m. rectus abdominis. Hráčky, které uvedly obtíže s bolestí dolní části zad, mají průměrně nižší hodnoty lineárních rozměrů všech měřených břišních svalů. Stranová asymetrie svalů břišní stěny se po korelaci s výsledky dotazníků překvapivě zdá být možným protektivním faktorem výskytu bolesti zad u těchto elitních hráček (Pearsonův korelační koeficient r = –0,39; p = 0,09). Pro potvrzení vztahu stranové asymetrie, biomechaniky florbalu a bolesti dolní části zad je vhodné rozšířit výzkum v této oblasti při zapojení většího množstvím probandů. Zároveň je třeba zdůraznit, že zjištění možného protektivního vlivu asymetrie u elitních hráček není přenositelné na obecnou populaci a že nebyl hodnocen dlouhodobý vliv této asymetrie na výskyt bolestí v pozdějším věku.
The article contains an evaluation of the morphology of the abdominal wall muscles focusing on the assessment of lateral symmetry in elite floorball players and its relationship with the occurrence of low back pain. A total of 20 female players of women‘s floorball extraleague, who filled out an electronic questionnaire assessing low back pain, participated in the evaluation. The linear parameters of the abdominal wall muscles were measured in the players on both sides at rest using sonography. A significant lateral asymmetry of the linear parameters of abdominal wall muscles was demonstrated in the work (P = 0.02; Cohen‘s d = 0.52). However, the relationship between this asymmetry and the biomechanics of movement in floorball, correlated with the side of the player’s stick, cannot be proven based on the collected data (P = 0.34–0.95; Cohen‘s d = –0.15 to 0.38). We also observe certain trends in the results. Compared to the previously published female average, we notice hypertrophy of the rectus abdominis in participants. On average, female players who reported low back pain have lower values of the linear parameters of abdominal wall muscles. After correlation with the results of the questionnaires, lateral asymmetry of the abdominal wall muscles surprisingly appears to be a possible protective factor in the occurrence of back pain in these elite players (Pearson‘s correlation coefficient r = –0.39; P = 0.09). To confirm the relationship between lateral asymmetry, floorball biomechanics and low back pain, it is advisable to expand research in this area by involving a larger number of probands. At the same time, it should be emphasized that the finding of a possible protective effect of asymmetry in elite female players is not transferable to the general population and that the long-term effect of this asymmetry on the occurrence of pain in later life has not been evaluated.
Background: Pelvic, spinal and hips asymmetries constitute common phenomena. Pelvic asymmetry is usually perceived from two different points of view: as a causative factor in certain motor system dysfunctions or as a symptom of existing dysfunctions. Objective: This study aimed to evaluate the difference in activation asymmetry of lateral abdominal muscles (LAM) and the difference in body weight distribution on lower extremities during prolonged standing between subjects with and without pelvic asymmetry, and check if there is a correlation between the magnitude of pelvic asymmetry and activation asymmetry of lateral abdominal muscles as well as body weight distribution on lower extremities. Methods: A total of 66 subjects (34 women) participated in the study. LAM activation was measured using ultrasound technology. Body weight distribution asymmetry on lower extremities was measured during prolonged barefoot standing on the two scales equipped with digital readings. The activation asymmetry index and the weight distribution asymmetry index between the left and right sides of the body were calculated. Results: The recorded weight distribution asymmetry indexes were slightly higher in subjects with pelvic asymmetry; however, no significant inter-group differences were found. These subjects did not show any significant difference from subjects without asymmetry for activation asymmetry index recorded in all individual LAMs (obliquus externus abdominis p = .68, obliquus internus abdominis p = .34, transversus abdominis p = .55). Conclusions: No differences were found between subjects with and without pelvic asymmetry in activation asymmetry of lateral abdominal muscles and body weight distribution on lower extremities. Thus, there was no evidence gathered to prove that pelvic asymmetry constitutes an advantageous or disadvantageous phenomenon. It seems that it may play only a minor role, if any, in the energy expenditure optimisation process during prolonged standing. It is unlikely that pelvic asymmetry may lead to or stem from activation asymmetry of lateral abdominal muscles.
- Keywords
- asymetrie,
- MeSH
- Abdominal Muscles diagnostic imaging MeSH
- Adult MeSH
- Humans MeSH
- Musculoskeletal System MeSH
- Pelvis * abnormalities diagnostic imaging MeSH
- Standing Position * MeSH
- Body Weight MeSH
- Ultrasonography methods MeSH
- Check Tag
- Adult MeSH
- Humans MeSH
- Publication type
- Clinical Study MeSH
