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Background and Study Aim   To evaluate anterior-posterior spine curvatures and incidence of sagittal defects in children and adolescents practicing traditional Karate.Material and Methods   152 people aged 6-16 yrs, mean age 10.5±3.03. The study group (SG), subjects attending traditional Karate classes for min one year, 60 minutes twice a week (76 people). The control group (CG) randomly selected on 1:1 basis to match SG. The anterior-posterior curvatures were measured with a gravitational inclinometer. Sauder's norms were used to assess postural defects. Body mass, height, and BMI were measured. Mann-Whitney U-test/Student's t-test for independent variables,  χ  2  test, and Cramer V test were used in statistical analysis.Results   Significant differences were observed between the groups in lumbosacral inclination ALPHA1 p<0.001; karateka had significantly lower ALPHA 1 and greater thoracic inclination (GAMMA TH/L) p=0.23. In study group, lumbosacral angle flattening (ALPHA 2) (81.6%) was greater than in CG (56.6%). ALPHA 2 (43.4%) was more frequently within the norm in CG. Increased ALPHA 2 was reported only among SG (2.6%). Differences were statistically significant ( χ  2  (2) = 15.23 p<0.001) and of moderate power (Cramer V=0.31). Regarding thoracic kyphosis and lumbar lordosis, there were no statistically significant differences between the groups.Conclusions   Traditional Karate affects pelvic tilt leading to posterior tilt; it correlates with somatic parameters: height, mass, and BMI in terms of spine curvatures. The size of the lumbar lordosis and thoracic kyphosis in karatekas is comparable to that of those not practicing sport. Frequent incidence of reduced pelvic tilt in karatekas requires implementing exercises activating anterior tilt during training session.

Evaluation of Anterior-Posterior Spine Curvatures and Incidence of Sagittal Defects in Children and Adolescents Practicing Traditional Karate