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Reliability of 2-Dimensional Video Analysis in Adolescent Runners
Yukiko Matsuzaki1,2, Madison R Heath3, Julianne M Khan2
1Department of Pediatric Rehabilitation, Department of Sports Rehabilitation and Performance, Hospital for Special Surgery, New York, NY, USA.
Summary
Two-dimensional (2D) video analysis of running is reliable for adolescent kinematic variables, excluding step width and foot progression. Training enhances consistency for both experienced and inexperienced raters in youth running assessments.
Area of Science:
- Biomechanics
- Sports Medicine
- Pediatric 운동 Science
Background:
- Limited research exists on the reliability of qualitative and quantitative measures for running video analysis in adolescents.
- Existing reliability data for 2D video analysis in adult runners may not directly apply to younger populations.
Purpose of the Study:
- To determine the intra-rater and inter-rater reliability of sagittal and frontal plane kinematics using 2D video analysis in healthy adolescent runners.
Main Methods:
- High-definition 2D videos of 10 adolescent runners (14-18 years) were recorded on a treadmill.
- Markers were placed on the cervical spine, pelvis, and lower extremities.
- Kinematic variables were measured using Dartfish software by three raters; reliability was assessed using intraclass correlation coefficients (ICCs).
Main Results:
- Intra-rater reliability varied by rater experience, with ICCs ranging from 0.367 to 0.999.
- Inter-rater reliability ranged from -0.01 to 0.941 across all raters.
- Eleven kinematic variables demonstrated substantial agreement, and four showed almost perfect agreement; step width and foot progression had fair and poor agreement, respectively.
Conclusions:
- Two-dimensional video analysis is reliable for most running kinematic variables in adolescents.
- Step width and foot progression measurements using 2D video analysis showed lower reliability in this population.
- Training can improve the consistency of inexperienced raters in performing adolescent running kinematic analysis.
