Reliability of the angular kinematic of knee and ankle during the running in the sagittal plane measured with Younext Direct Motion Capture®
Abstract
The popularity of running has increased remarkably the past forty years. Its popularity and the large number of injuries make running the most studied physical activity in the area of biomechanics. In clinical practice, joint kinematics during running are primarily quantified by two-dimensional motion-analysis software. Younext Direct Motion Capture® (Podoactiva S.L., Huesca) is a software that analyzes the kinematic parameters during the running in the sagittal plane. The main goal of this study was to determine the reliability and repeatability of the angular kinematics of the knee and ankle in the sagittal plane in a healthy population using Younext Direct Motion Capture®. Observational pilot study of concordance. 8 subjects (5 men and 3 women) were filmed while running on a treadmill, obtaining three recordings of the running cycle of each participant in the first session. A second session of recordings was made 7 days after the first recording to re-record following the same protocol. The intraclass correlation coefficient (ICC) was calculated to determine the intra-session reliability and inter-session reliability of the software when measuring the kinematics of the knee and the ankle. Very good intra-session and inter-session reliability (ICC> 0.81) were obtained for both ankle and knee measurements. This study showed that Younext Direct Motion Capture® software is reliable for analyzing the angular kinematics of the knee and ankle during running in a healthy adult population.
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