A RELATIONSHIP BETWEEN HAMSTRING SHORTENING, BODY POSTURE AND BODY MASS INDEX IN BOYS UNDERTAKING FOOTBALL TRAINING

Adequate length and tension of postural muscles are necessary to maintain proper body posture enable basic movement patterns be correctly carried out. These include the hamstrings. Research results show that these often characterised by reduced elasticity excessive passive stiffness. The aim our study was assess relationship between hamstring shortening, weight in physically active boys. involved 69 boys aged from 6 19 years who regularly took part football training (at least three times a week) for at 12 months. Body height (calibrated anthropometer), (electronic balance TANITA), torso positioning planes (ultrasonic system ZEBIS Pointer) flexibility hamstrings (goniometer) were analysed. Descriptive statistics, cardinality tables, Kruskal-Wallis test an effect size used statistical analysis. reduction both legs diagnosed 50.72 % one leg 13.05 studied, while 24.65 overweight 4.35 obese. No significant differences position found groups distinguished flexibility. However, subjects with shortening tended have increased pelvic torsion, angular kyphosis lumbar lordosis, greater asymmetry right left pelvis shoulders, scoliotic deformities. A correlation flexibility, mass index (BMI). Common taking does not significantly affect but correlates BMI. Stretching exercises soft tissue mobilisation techniques should included young players.