Comparison of Effect of Running Different Speeds on Coordination and Coordination Variability between Trunk, Pelvic, and Hip during Treadmill Running
Poster Presentation XML
Paper ID : 1691-11THCONF
1Master in Sports Biomechanics, Faculty of Physical Education and Sports Sciences, Kharazmi University
2assistant proffessor of faculty of pysical education and sport sciences, kharazmi university
3Assistant Professor, Faculty of Physical Education and Sport Sciences, Kharazmi University
Introduction: Comparison of the effect of running with different speeds on kinetic and kinematic parameters can results in better perception of running pattern differences. The coordination between joints and muscles cause suitable production and distribution of force on the lumbar spine and lower limb joints. Thus, the purpose of this study was to compare the effect of treadmill running with different speeds on coordination and coordination variability of trunk, pelvic, and hip.
Methodology: Twenty-four physically active male and female voluntarily participated in this research. Kinematics data during 10 successive steps of treadmill running at preferred speed, and 80% and 120% of preferred speed were recorded using 3D motion analysis system (MYOMOTION, NORAXON) at frequency of 200 Hz. Segments angle data during running cycles were normalized to 100 data points and were splitted to ten periods. Coordination and coordination variability were calculated using Continuous Relative Phase (CRP) and CRP variability methods in different speeds for trunk, pelvic and hip segments.
Results: The results of Repeated Measure ANOVA showed that there were significant differences in trunk-pelvic and trunk-hip CRP and CRP variability in last cycles of treadmill running after increasing the speed (P ≤ 0.05) and significant differences in pelvic-hip CRP and CRP variability in middle cycles of treadmill running after increasing the speed (P ≤ 0.05).
Discussion: In general, with increasing speed, the coordination of increased and coordination variability decreased. The findings showed changes in coordination and variability in the swing phase of the running cycle, it seems to be due to a change in limb acceleration and it can reduce energy costs and reduce injuries, also it has effective on the stability and stability of the postural.