The Analysis Of Lumbar Spine,Pelvis And Hip Characteristics Associated With Low Back Pain In Elite Trampolinists

Objective:Low back pain is a common injury among athletes, affecting the health of the athletes and the athletic performance. Currently, low back pain in athletes is not yet fully recognized and clear. This study’s aim is studying lumbar, pelvis posture, hip range of motion and lumbar coordination and other physical characteristics, and seeking the relationship of low back pain and these features, trying to find the characteristics of low back pain in elite trampolinists, and then putting the new examination and treatment of low back pain perspective view into rehabilitation division, finaally providing an important theoretical basis for the implementation of rehabilitation. Methods:In this study,20 (male 10, female 10) Chinese elite trampoline athletes were observed with the inclusion criteria to back pain group (15) and non-low back pain group (5). Its trunk flexion, lateral flexion, rotation strength tests, lumbar activity test, hip range of motion of the test, the hip external rotation of the pelvis and lumbopelvic-hip coordination tests. T-test was used in the comparison between low back pain and non-low back pain group.Results:In our national trampoline team athletes, flexion-extension radio (F/E) and the rotation ratio in athletes with low back pain was significantly greater than non-pain group (p<0.05); male’ hip flexion ROM is less than female’s (p< 0.05); F/E is correlated with pelvic tilt angle (r= 0.69, p<0.05); The pelvis rotation angle when the hip rotation in male was significantly larger than in females (p<0.05); The hip internal rotation ROM in pain group was significantly lower than in non-pain athletes (p<0.05), the onset angle of lumbopelvic rotation in pain free side was significantly lower than in non-painful side (p<0.05); The hip internal rotation angle when the pelvis starts rotatation in low back pain group is less than the non-low back pain group (p<0.05). Conclusions:The limitated hip rotation ROM is associated with low back pain in trampoline athletes. That the external hip rotation angle in symptomatic side is less than ipsilateral body, suggesting that trampoline athletes low back pain is associated with limited hip joints rotation. The pelvis and lumbar control among trampoline athletes is delined in chronic low back pain group, and the lose of pelvis during the rotation of hip is related to low back pain.the pelvic tilt angle among trampoline athletes differed frome 5° to 16°. Trampoline athletes’ pelvic tilt and lumbar flexion has no significant relationship, but the trampolinists whose pelvic tilt angle are greater have greater F/E.