| Abstract ID |
| 20260052 |
| Category |
| Knee: Miscellaneous |
| Preferable Presentation |
| Oral Presentation |
| Title |
| THE INFLUENCE OF RUNNING KINEMATIC CHARACTERISTICS ON THE OCCURRENCE OF ILIOTIBIAL BAND SYNDROME |
| Author |
|
| Presenter |
| Peixin sHEN |
| Abstract |
| Background: Iliotibial band syndrome (ITBS) is the second most common running injury, accounts for 1.6%–12% of all running-related injuries, and is the leading cause of lateral knee pain in runners. The exact etiology of ITBS is unclear, but biomechanics is considered one of the factors.The exact etiology of ITBS is unclear, but biomechanics is considered one of the factors. Iliotibial band leads to increased strain with increasing angle of the lower extremity. It was reported women ITBS runners exhibit greater peak hip adduction and knee internal rotation angles, and pelvis and trunk gait characteristics are also associated with ITBS in female runners. In addition, previous studies mostly focused on stance phases, which were conducted on females or mixed genders. However, most of the previous studies on ITBS were retrospective ones, it were difficult to elaborate the pathogenesis. Objective: This study aimed to determine the gait characteristics that easily induce ITBS and explore the gait changes after the occurrence of ITBS. Study design: All participants were recruited from a university running club and comprised healthy male recreational runners without any type of neuromuscular problems. They run approximately 24 miles/week with a horizontal velocity of approximately 3.7 m/s. A total of 192 male runners finished the 8-week running program and our tests. Fifteen of these male runners who were diagnosed with ITBS after the 8-week running program by a medical professional were included in the ITBS group, and a healthy control group was created by recruiting 15 healthy age-, height-, and weight-matched runners. All participants underwent two gait trials, namely, before the first day of their routine running (trial 1) and after 8 weeks (trial 2) . A Kistler force plate (1000 Hz) and an eight-camera Vicon motion capture system (100 Hz) were synchronously used to collect kinetic and kinematic data. The confidence interval of mean difference values between groups were calculated by using independent-sample t-tests and between trials by paired-sample t-test. Results: After 8 weeks of running, the ITBS group had a greater anterior pelvic tilt angle than the control group in trial 2 (It2=19.17°, Ct2=11.82°, CI95%: −11.23/−3.49, very large effect). There were differences between the ITBS and the control group in the peak hip flexion angle in trial 2 (It2=42.80°, Ct2=32.85°, CI95%: −17.0/ −2.91, large effect), and that of the control group in trial 2 was significantly smaller than in trial 1 (Ct1=37.99°, Ct2=32.85°, CI95%: 1.54/ 8.75, moderate effect). The peak hip adduction angle of the control group decreased in trial 2 (Ct1=14.38°, Ct2=11.77°, CI95%: 1.69/ 6.22, moderate effect), but no significant difference was found in the ITBS group or between two groups . Conclusion: Decreased peak hip flexion and peak hip adduction angle was a gait adjustment strategy that could be used to avoid ITBS occurrence. Excessive trunk posture and pelvic activity during running are also ITBS risk factors. |